The protocol was released in 2019. The LLM was released in 2024.

Mono is owned by WineHQ

And there are other tools that use the same database format. I use keepassDX and keepassXC

Catima can also handle pkpass (Apple wallet) files now, although last I checked it chokes on “pkpasses”, the zipped collective version

In essence keepass is an open database format and a bunch of different software tools have been written to interact with it. You can quite happily share the same keepass database between different software, e.g. synced between desktop and mobile