@MPhamWMF: GSC access is per-domain – and even mobile (.m.) domains are separate from the desktop versions. Which Wikipedias do you need access to?
There is technically an option to give access to "all" Wikipedias but if you're interested in, say, looking at search queries that bring people in, those are limited to top 1000 and are largely dominated by English queries and English Wikipedia. That might be OK for your use case but if you're interested in more granular (and especially languages other than English) you'll need to provide a short list of specific languages (because giving users access is a manual, tedious multi-step process).
Thanks for the detail @mpopov . Let's start with just English then, as it'll also be relatively harder for me to personally parse text in languages I don't speak as well. I will request other languages as they become relevant
I happened to see Mike's question in Slack and this request was a result of that thread. I just gave Mike access (limited, as is the default/norm) to https://en.wikipedia.org and https://en.m.wikipedia.org & https://en.wikipedia.org
@MPhamWMF can you please go to https://search.google.com/u/0/search-console/ (assuming your staff account is the first/only Google account you're logged in to) and verify that both of those show up in the property selector in the top left?
Assuming everything is OK so closing for now. Feel free to reopen or follow up if there are any issues.
@mpopov sorry for the late response. I can verify that I see both on my search console. Thanks!