Believe me its not just the UK that have bike supply issues, and its not just bikes, pretty much everything mechanical component wise that has its manufacturing done in China currently has issues. I live in Taiwan, can't get bikes here either.. parts suppliers in China don't know where and when materials will arrive, so the big assemblers in Taiwan can't get components.... and its not just materials, containers for shipping are currently in very short supply, thus pushing up costs. Covid measures in factories in China and Taiwan have seriously slowed production. There is close to zero international traveling in Asia.. so technicians and engineers are not traveling.
As bicycle manufacturing is not seen as a priority for either China or Taiwan, governments are concentrating of other industries..... so these issues are going to go on well into next year and even beyond.
A friend locally here in Taipei has had a Surly Disc Trucker on order since last November, this week he gave up and the LBS have given him his deposit back. I have wanted a Merida Silex 400 for a long while, I gave up and bought a 200 that I found in a shop in my size, as no one could give me delivery date for new bikes in 2021 or now 2022.... I wanted the GRX drive train on the Silex 400, but now have settled for Sora on the 200.... I'll wait a couple of years and then see whats out there.