Join two SSD disk in one partition APFS. Is it fussion?

[alfon_sico]

Recently I change my HDD 500GB by a SSD 500GB in Mac Mini
As I had a SSD 120 for boot the system I had a 620GB of Fussion Disk

As I know the new file system in Catalina (with 2 different volumes) I install Mojave macOS in the new 500GB SSD formatted as APFS and add the 120GB SSD as APFS new disk, so I have 2 disk, 1 with the system and another wmpty

What I want to do is ADD the 120 GB to the primary Volume" for getting a 640GB (preferably without erase nothing
One I get this logical volume I will update to Catalina macOS

I know how to do it with fussion drive commands CS but Im not sure if its compatible with APFS or if there is a better way

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *500.1 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk2         499.9 GB   disk0s2

/dev/disk1 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *128.0 GB   disk1
   1:                        EFI EFI                     209.7 MB   disk1s1
   2:                 Apple_APFS Container disk5         127.8 GB   disk1s2

/dev/disk2 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +499.9 GB   disk2
                                 Physical Store disk0s2
   1:                APFS Volume SSD500                  181.3 GB   disk2s1
   2:                APFS Volume Preboot                 45.4 MB    disk2s2
   3:                APFS Volume Recovery                507.4 MB   disk2s3
   4:                APFS Volume VM                      2.1 GB     disk2s4

/dev/disk5 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +127.8 GB   disk5
                                 Physical Store disk1s2
   1:                APFS Volume extra                   659.5 KB   disk5s1

 

[alfon_sico]

Is there any way for add the Volume disk3s1 at disk2s1 into the Container disk2?

+-- Container disk2 D92EE2AB-*****
|   ====================================================
|   APFS Container Reference:     disk2
|   Size (Capacity Ceiling):      499898105856 B (499.9 GB)
|   Capacity In Use By Volumes:   269598928896 B (269.6 GB) (53.9% used)
|   Capacity Not Allocated:       230299176960 B (230.3 GB) (46.1% free)
|   |
|   +-< Physical Store disk0s2 124EEB6A-****
|   |   -----------------------------------------------------------
|   |   APFS Physical Store Disk:   disk0s2
|   |   Size:                       499898105856 B (499.9 GB)
|   |
|   +-> Volume disk2s1 FF9D1291-E52C-*****
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk2s1 (Data)
|   |   Name:                      SSD500 - Datos (Case-insensitive)
|   |   Mount Point:               /System/Volumes/Data
|   |   Capacity Consumed:         255743840256 B (255.7 GB)
|   |
|   +-> Volume disk2s2 4BF5559C-94B0-*****
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk2s2 (Preboot)
|   |   Name:                      Preboot (Case-insensitive)
|   |   Mount Point:               Not Mounted
|   |   Capacity Consumed:         82644992 B (82.6 MB)
|   |
|   +-> Volume disk2s3 D31FCF07-8B12-****
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk2s3 (Recovery)
|   |   Name:                      Recovery (Case-insensitive)
|   |   Mount Point:               Not Mounted
|   |   Capacity Consumed:         525447168 B (525.4 MB)
|   |
|   +-> Volume disk2s4 DA9016E6-1BB5-*****
|   |   ---------------------------------------------------
|   |   APFS Volume Disk (Role):   disk2s4 (VM)
|   |   Name:                      VM (Case-insensitive)
|   |   Mount Point:               /private/var/vm
|   |   Capacity Consumed:         2148552704 B (2.1 GB)
|   |
|   +-> Volume disk2s5 FB3CDC33-0CEC-******
|       ---------------------------------------------------
|       APFS Volume Disk (Role):   disk2s5 (System)
|       Name:                      SSD500 (Case-insensitive)
|       Mount Point:               /
|       Capacity Consumed:         10945343488 B (10.9 GB)
|
+-- Container disk3 EDD38F12-*****
    ====================================================
    APFS Container Reference:     disk3
    Size (Capacity Ceiling):      127825920000 B (127.8 GB)
    Capacity In Use By Volumes:   127430656 B (127.4 MB) (0.1% used)
    Capacity Not Allocated:       127698489344 B (127.7 GB) (99.9% free)
    |
    +-< Physical Store disk1s2 AEA9CE55-******
    |   -----------------------------------------------------------
    |   APFS Physical Store Disk:   disk1s2
    |   Size:                       127825920000 B (127.8 GB)
    |
    +-> Volume disk3s1 84D13C77-345F-********
        ---------------------------------------------------
        APFS Volume Disk (Role):   disk3s1 (No specific role)
        Name:                      extra (Case-insensitive)
        Mount Point:               /Volumes/extra
        Capacity Consumed:         1044480 B (1.0 MB)