During 1.39 we have added the SpecialContributeSkinsDisabled feature flag (later renamed to SpecialContributeSkinsEnabled) as a temporary stopgap that controls whether the tabs are shown at the top of the Special:Contributions page. We would like to remove this prior to the 1.40 release so that we do not have to support it in future MediaWiki releases.
At time of writing this flag is enabled on the beta cluster for Minerva skin:
https://en.wikipedia.beta.wmflabs.org/wiki/Special:Contributions/Jdlrobson
Without the feature flag, the menu will automatically show up on Vector 2022 and Minerva skins (as well as any third party skins which make use of this special menu for special pages).
Background: T319327#8376355