Thanks for your answer Chris,
the new ‘MapPress’ button only shows up when using the classic editor. We already switched to block editor last year. Until the last update we still used to add maps using the metabox as this was the only possible way to add maps. Now we’re quite stuck as it’s no longer possible to assign maps to a post on the post edit screen.
Do you have any suggestions how to handle map asignment now? For us it’s not possible to switch to inserting maps using blocks as this would mean having to manually edito 2000+ posts..