To see it in action:
Crust.piefed.social (the Piefed development instance)
Not all instances implement it yet, I guess it depends how often they pull from the dev branch
Example of search for 'movies'
It's now live on https://quokk.au as well!
This is a great feature to have, as I was reliant on newcommunities and communitypromo to find new comms.