I love KDE Connect! And it's even available for Windows users. Great piece of software that can do so many things. I've used it on many occasions to quickly get a link or something like that from my PC, having the ability to share your clipboard is amazing.
It's also been my main "share the password manager file" application for the longest time before someone else on Lemmy recommended Syncthing. But KDE Connect is still fantastic!
NIST seems to have it as a guideline for memorised secrets: