Resolved Ssh keys not being added to ssh-agent

[TECK]

I tried that on an Intel Mac Pro and well a M1 MacBook Pro running latest Ventura. For some reason, I cannot automatically add my ssh key to ssh-agent. My .ssh/config:

Host *
    AddKeysToAgent        yes
    IdentityFile          ~/.ssh/id_ed25519
    LogLevel              QUIET
    ServerAliveInterval   60
    StrictHostKeyChecking no
    TCPKeepAlive          yes
    UseKeychain           yes
    UserKnownHostsFile    /dev/null

AddKeysToAgent should add automatically the key to the agent, but for some reason, it does not. If I manually run the command, everything is fine, but once I reboot, the key is missing again. I know I could run a command in .bashrc but the idea is to use the standards, GitHub gives detailed instructions how to create the ed25519 key and add it to agent for Macs, but their guide does not work.

Thank you for your help.

Edit: I found the issue. ssh-agent is not running upon reboot, but as soon as you execute an ssh command from terminal, the agent will start and your key will be added automatically.