I think you don't need anything else by the README of vaultwarden. https://github.com/dani-garcia/vaultwarden

It has worked for me great without any issues for over a year now.

I agree. I've been using Vaultwarden on ARM for over a year and it's been flawless. Just excellent execution and seamless integration with the iOS App Store version of the Bitwarden client.

Long time Vaultwarden user as well. The VW docker image works wonders for me.

For myself, I just followed Bitwarden's own instructions to get the server set up: https://bitwarden.com/help/install-on-premise-linux/

As for Wireguard, this looks pretty comprehensive: https://dev.to/tangramvision/what-they-don-t-tell-you-about-...

There are nice mobile clients available for both BW and WG.