For what you call ‘MacOS like search’ I’d recommand Recoll, working on any OS (and perfectly on my Debian install, for years on) : really can find ANY text string inside any document, from almost any app (e. g. Joplin, that I’d bet nobody heard of here), also including e. g. words within attachments within zipped backup email databases, pictures located on unpermanent backup volumes etc.
Regularly updated, that the one thing that definitely had me ‘finally forgetting’ MacOSX.
Sorry to be late to the party, posted a comment to a comment much earlier; Krunner on Debian or practically anywhere else is Recoll