@mcc I can guarantee you that the Linux kernel and MacOS/Windows are getting code contributions by "random code generators" as you have put because most of the code pushed on to these projects are by engineers hired by big corporates who mostly have LLM subscriptions.
It is better to acknowledge and understand a tool than to spread FUD about it. I am no AI flag hoister but you are just scaring people away from genuinely good tools (password managers in this case) maintained by the same people for years.
KeePassXC is totally offline which reduces the attack vector a lot anyway. And the file format is open so you can pick from many clients if you don't trust KeePassXC maintainers.