Just found at another instance -- and think this is a really important development.
Fedisearch.com allows Full Text Searches on fedinet posted content -- from Mastodon, Pleroma, Misskey instances.
In Mastodon instances, Full Text Search is VERY RARE in my experience. It's available at qoto.org, and one reason I have recommended people to keep an account there if their main account does not provide it.
Even Elite instances have this option turned OFF (to save processor cycles and memory). Silly, because they could support that easily.
Now we have an external search Engine and it works. Tested briefly and found results I knew would be there, shown as expected.
Kudos for a much needed service and thank you to @fedisearch !
Ein kostenloses und werbefreies soziales Netzwerk für Personen aus Münster und Umgebung - und auch alle anderen!