We are using search_engine v2 for the Management API and to search users. It seems like v3 does not provide all the features that we need like wildcard search on app_metadata fields. Can you give an statement when v2 will not be served anymore and if you plan to migrate all features from v2 to v3?
The v2 search engine hit EOL in June of 2019 and is shut down at this point, so all queries are getting handled by the v3 engine. While the user search allows passing a search_engine=v2 parameter, the queries are still handled by the v3 engine.