Just an FYI to the Brits on this post - I've found US startups are happy to hire remote engineers from the UK. Might take a little bit of effort but it's surprisingly possible to get a six figure job quickly.
Make a UK company and they pay that as a contractor, you sort it out with HMRC yourself.
The Americans seem to be much higher paying, greater variety of roles, happy to let you remote.
Now is the time by the way, I was blown away by how hot the market is. Maybe jump in there before WFH starts to get retracted, you can do more interviews before you're back in the office.