Would absolutely love to have passwordless sign in, would be a nice to have to have passkey as a second factor as well

I completely agree. I also find it frustrating how often LunchMoney signs me out. The process of signing back in would be more streamlined if passkeys were supported.

Passkeys have entered the mainstream now, all major platforms, OSes and larger web companies now support them so it's a good time to get in front of it before it enters the mainstream consumer conscious!

For what it is work, 1Password has a product called Passage to help with adding support https://passage.1password.com/