UK market is tricky for a few reasons. Very centralized decision-making for healthcare funding, and the timelines are too long for a startup to survive. Plus us Brits are definitely more hesitant of medication approaches in general, although that is changing.
Both my parents, my sister and my brother-in-law work in the NHS - so lots of interesting family conversations about this!
I'm in the UK and would love to try Fella, especially if I could get it on the NHS with a GP referral.