Thanks for the reply. I had very little spare room to mess with the valve.

Bought a valve locally for $77, went without water for a week (valve wouldn't stop the flow), just to get the same valve for $18 through Amazon https://www.amazon.com/38531164-Sealand-Dometic-Toilets-Replacement/dp/B09HJC7FXB

I was very proud of myself and reason for this reply as it was easy to replace and not a single leak.