There are plenty of on-topic questions for Using Swift that are fundamentally about how Swift works rather than the specifics of a particular framework that presents a Swift interface. The current description could perhaps be narrowed to be clearer about what "related tools" means, but there is absolutely plenty to discuss in Using Swift without SwiftUI questions.
This is not the full story. Some people have offered this as a reason why it's good that these forums not be used for general SwiftUI support, but the backdrop of all this is that Apple has specifically asked that questions pertaining to their proprietary frameworks be directed to the Apple Developer Forums. Also re-upping John's response from a prior thread:
As Karl mentioned, these forums are not likely to be the best place to request a change in policy with regards to SwiftUI, because that policy is based on a request that comes from outside the Swift project. One could argue that we ought to disregard such requests from project maintainers, but I wouldn't expect that proposal to gain much traction.