Also Android Studio, XCode, all the React builder websites, etc. Basically every GUI platform + IDE has some form of a drag & drop interface builder.
The problem is that outside of the iOS ecosystem, there are too many subtle differences in behavior to really trust the results. And because a lot of software gets worldwide distribution these days, it's economically worth it to squeeze that last bit of performance & user friendliness out of the framework. So most professional programmers learn how to do things programmatically and only use the interface builder if they're doing a quick internal tool.
The problem is that outside of the iOS ecosystem, there are too many subtle differences in behavior to really trust the results. And because a lot of software gets worldwide distribution these days, it's economically worth it to squeeze that last bit of performance & user friendliness out of the framework. So most professional programmers learn how to do things programmatically and only use the interface builder if they're doing a quick internal tool.