The UK can pretend all they want, but they ain’t part of the metric club.

You can get GPS systems that upload data using a SIM. Only viable if you live somewhere with cheap roaming plans. Last I checked, a local company was selling the hardware (without sim) for 200EUR. The thing I was trying to protect was 120-ish.

I use KeePassXC. I have shared the keys with someone I trust in person in case of death. I sync by manually copying the database between my devices.