Make sure your gov.gateway is accessible for later pension stuff. Make sure you can keep your uk bank account if in the new country - i couldnt. Had to close it and transfer costs are high in emergencies. If your bank has an app Make sure it will work in thd new country. I had to change to UK on my phone for a year (Google rule?) to be able to get an app.

We're a fair few years on, but I changed to a very large bank before emigrating. Nowadays a second account with Wise or similar would probably suffice for occasional use.

I should have moved my UK phone number to a pre-pay plan on a premium network (O2, Vodafone etc), I left it on a budget one which cancelled it with very little notice.

Well EU immigration basically made it tougher for brits to emigrate, which is fair enough.

I can't elaborate too much but high skilled and family reunification pathways are still open, but the tests and documentation are more onerous than before brexit.