Thing is, it doesn't have to. As long as PS4/XBO will get supported with ports, there's no reason why they don't make a Switch version out of those, too.
It doesn't even need that; it could live on just fine on indies, exclusives like Octopath and Astral Chain, ports of older games, and first party. AAA blockbusters have never been the system's selling point so losing what few it has won't matter.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.