Revanced can’t exist as a standalone app to be installed like from a store. Google would nuke it. It has to be a patcher. Original Vanced was a standalone app and that is what allowed Google to nuke it from orbit. It’s arguable that Google ignored Vanced until the developers got money grubby and tried making NFTs, but the method they used for takedown was DMCA since it was their app just modified.

This is the same thing as ROM hacks, randomizers, etc and why they include a place to upload your own copy of the ROM rather than providing their own. Reverse engineering and modifying are legal, distributing copyright source, binaries, or blobs without the rightsholder permissions is not.

They also do have a repo for it, as well as the offshoot apps like Revanced manager, other app patches, etc. The fact it’s not at the top of Google results is a Google-and-SEO problem, not a Revanced problem.

If you want a one and done app install then something like Newpipe is what you want, which is built completely on its own. Revanced is explicitly not that, it’s the stock app hacked up. IMHO, Revanced is a nicer experience, but they are two very different experiences and approaches.