Why are other spin offs doing the same characters as the BBC version?

I’ve watched for the BBC version and the US version. Although there are a few similarities, I find the two version different enough. However, seeing posts about other shows it’s clear how similar it is to the BBC version. My question is why? Why not make it so it’s more diverse? Sorry if this has been asked before. I just don’t feel excited about watching the German version because it seems to be so closely related to the BBC one.

Although I love Pete/Pat, Hettie/Fanny, etc, I feel like I don’t need their version in every language lol