There is a new PoW fork that was started by miners that want to continue mining. Some of the work could go there assuming it doesn't tank. I personally don't see the utility though, doubt it will be able to attract many users.
Although irc you need to use a cpu, not a gpu to mine it.
It looks like it's already happening. After the merge there were a number of coins that saw huge spikes in hash rate which drove them to absolutely unprofitable levels. A lot of that hash rate has since gone elsewhere (most likely offline) and it looks like many coins are settling at a level in the short term that is breakeven at $0.06-0.08 kWh which many (most?) miners can't be profitable at as that is below their electric rate.
https://amycastor.com/2022/09/11/crypto-collapse-celsius-voy...
https://davidgerard.co.uk/blockchain/2022/08/11/crypto-colla...
As they thrash around in bankruptcy, they have proposed that they will mine their way out of the hole. Will this work? I doubt it. But will it let the CEO stay in charge for a while longer, taking in more investor money and continuing to get paid? Possibly! So actual economic efficiency may not matter.
Those pile of GPU are going to be a write off since prices are dropping and supply issue improves as well.