Why do people assume that just because we are older (I am almost 78) that we can't operate a smart phone? The only case I can think of is the person has early onset Alzheimers ( that is difficult to diagnose in the early stages). My father-in-law had it, and we didn't realize it. He seemed to function ok, but had problems with Outlook express (kept changing layout). I have an iPhone 12Pro, AW SS5, Apple TV and new iMac 24". Get him a new SE or what ever he would like, he will love it (and you). I am sure you don't want to mess with an old phone off eBay.
BTW I still ride my 800cc V4 sport bike through the twisty back roads.
EDIT: Sorry I didn't notice you bought it already. I had the X before the 12Pro, if it checks outs, it is a good phone.
Oh yeah, I don't assume, but in my case, my dad is not tech savvy much at all, I will have to teach him how to use it, but we have run into things needed, that required apps, or will only work with apps, and so both he and my mom will need smart phones.
I am aware that some older people not all, but in my case stay in the past, my parents have to some degree, they are used to the analog era (still use VCR tapes), and 20+ year old map books and phone books. Both have not adapted as well to new tach, and prefer older stuff, but in some cases it is impossible. They both prefer to kind of stay with things they are familiar with, from the 70's and 80's.
I have to teach them some things, my mom knows a bit more, but a-lot of modern tech makes hime nervous. But I also want us all to be able to communicate with one another, on mobile phones, and not just landline telephones.