However, those people are mostly going to work outside the startup bubble. The startup scene that a lot of us work in here is not doing so great. Funding is much harder to find, pickier, and more interested in revenue now than a story about the future. Frothy startups are imploding.
The result of this is that, if you look at the indeed jobs data, while the overall jobs market is pretty good, the tech jobs market is about 60% of what it was in 2019.
I imagine a lot of people who got into tech during the pandemic hiring bubble (go on furlough, do an online javascript bootcamp, get a 70K salary) are going back to what ever they got furloughed from.
So it is harder to get a job for everyone, but the relatively easy visas for tech workers and english working language mean that the flow of labour into the market continues to increase.
We can expect this to result in continued divergence between UK and US salaries. UK tech salaries remain about 2-4x Indian tech salaries for equivalent workers for instance, so the UK remains an attractive destination for earning money and building a nest egg back home.