guess: Wechat grabs the bag directly. Wechat needs to access the domain name before jumping, so you should be able to get this request.
I didn't verify it, but I think it should be like this: in Wechat, we all know that he has a built-in browser. When visiting a URL, he should go to Wechat's URL first, and then jump to the URL you want to open. In the middle, I think he has verified whether your URL is blocked
.