The MSG100 from Meross is now available in the homekit variety on Amazon UK. I just ordered one:
[https://www.amazon.co.uk/Control-Existing-Compatible-Assistant-SmartThings/dp/B086MLFRJ3/ref=sr_1_4?dchild=1&keywords=meross+garage+door&qid=1602298786&sr=8-4](Https://www.amazon.co.uk/Control-Existing-Compatible-Assistant-SmartThings/dp/B086MLFRJ3/ref=sr_1_4?dchild=1&keywords=meross+garage+door&qid=1602298786&sr=8-4)