I'm an American (US) citizen, but OK, let's say I want to do my startup in Scotland. Is there a new "come to the UK and live here and do a startup for as long

I'm an American (US) citizen, but OK, let's say I want to do my startup in Scotland. Is there a new "come to the UK and live here and do a startup for as long as it takes" visa that I'm not aware of? Country after country (I'm talking to you Canada) makes all kinds of noises about wanting startups to take root on their soil, but damned if they're going to let any foreigners come to help make it happen. So this article would be more aptly titled "Benefits of basing your startup in Scotland if you're a EU citizen or permanent resident already otherwise buzz off".