I've been noticing lately that a whole bunch of articles still call Astana "Nur-Sultan" against WP:NAMECHANGES and WP:COMMONNAME - it should be Astana for 1991-March 2019, Nur-Sultan for March 2019-Sept 2022 and Astana from then onwards (and Akmolinsk, Tselinograd or Akmola even before, but not many articles mention that AFAIK), but Wikipedia uses Nur-Sultan virtually everywhere. Commons, Wikidata and other language projects seem to have the same issue with Nur-Sultan/Astana's naming as well.
A good rule of thumb to go by is that if a majority of reliable sources describing an event talk about it being established in Astana/Nur-Sultan, we call it as established in Astana/Nur-Sultan/whatever the majority of sources call the capital of Kazakhstan at that moment.
Unfortunately, I have zero knowledge of Russian, Kazakh or Cyrillic script for that matter (The only thing I know is that "Privyet" means "hi" and that's it), so sources are *not* always 100% accessible to me and I am not an expert on the area. I may need to reach out to editors with fluency in Russian or Kazakh when determining the current title of certain pages due to lack of English sources but more sources in Russian or Kazakh existing. I am not a subject area expert at all either and just another editor who happened to find large-scale errors across multiple articles while reading Wikipedia, so I will try to be careful when editing articles in this subject area because I don't want to unknowingly cause disruption due to lack of competence.
This page will be used as a page to keep track of where I spot those errors so I can fix them later (namely, where Nur-Sultan is linked instead of Astana) - there are so many of those errors that fixing all of them in one sitting is infeasible (after all, I have an off-wiki life to deal with - no one lives on Wikipedia). Other editors are more than welcome to help me fix those errors themselves and post errors they find on this page as well, though, and I will happily appreciate any outside help. Please note that pages listed on this page isn't just the only ones that erroneously contain "Nur-Sultan" - there are other pages with this error too that may not be listed here.