Best thing about windows and biggest thing I miss. Have never been able to find equivalent for Mac — stuff that comes close but really not quite the magic of Everything. Same w Total Commander. Sad!
It's not a gui, but in case you hadn't heard of it before: unixes usually have a `locate` command that'll do ~instant file/folder name searches. The index is usually rebuilt via a cron job though, it's not always up to date like Windows can do.
It's slower to start-up than Everything but just as useful once running.
There are a few Mac oddities like OneDrive files appearing twice because macOS is convinced they exist in two locations, but that's a minor annoyance.