You can upgrade from 1Password 6 to 7 (standalone) to get the Safari extension to work. It's not great, but I don't use Safari so it doesn't affect me.
Frankly, the new 1Password mini app is a strong step in the wrong direction since 6. It's huge, it tries to do too much. I've never been happy with it. I switched to Bitwarden and generally it serves the purposes better. A few things are worse but the stuff I interact with regularly is better.
