Board Thread:Support Requests - Community Management/@comment-3309434-20200831005407/@comment-25014407-20200831012259

There is no way for "regular" users to check other wikis a user has contributed on, except for the "favorite wikis" section in the masthead/profile. This is intentional to limit cross-wiki harassment. As you said, if you have a good reason to contact staff, please do so (sometimes they've also done checks for less-good reasons). The best thing would be to assume good faith and hope they're just seeing those blocks in the logs, usually accounts of 2 years old are not a recently created account of a troll.