Uninstalling OCLP but keeping Office

I recently bought a 2015 MBP. It came with Monterey and pre installed Office 2019. I put OCLP Sequoia on it but I don't like how slow it is occasionally and heats up, battery also lasts only about 3 hours max.

SO I would like to revert to Monterey and sell it but it would be good to keep Office on it, is that doable? I need a complete wipe, right? Can I somehow save Office license and reinstall it? Or is there another way?

Edit: is it worth downgrading to Sonoma as perhaps last try? I'm running Sonoma on my 2013 iMac and it's decent, Sequoia was too slow.