These articles use the word "backdoor" for effect, for example <https://www.schneier.com/blog/archives/2021/08/apple-adds-a-...>. The bills you refer to by multiple countries simply want their own in-house wiretapping apparatus, because they don't want to be dependent on the US. Specifically, I'm thinking of EU's "chat control". Ironically those who oppose it are unwittingly doing the bidding for a more powerful US. The internet is fully wiretapped and there is no end in sight.
No they use the word backdoor because there is no better word for these pathwatys/purposefully created weak spots in access to the software. Seriously please give me one that emphasises the security detriment to the 1st party user and i'll happily use it instead.
I'll also add that ironically those who don't oppose these bills are unwittingly doing the bidding of strategic adversaries as demonstrated quite adequately by the PRC here.
