I had the same frustrations recently with my MacBook Pro, with macOS constantly telling me about Tahoe despite OCLP--which I used to patch my unsupported Mac to Sonoma--currently not supporting that version of macOS. These notifications aren't able to be disabled, just like in Windows--trust me, I tried to do that. They irritated me so much, that I've actually taken to installing Ubuntu on the Mac just so I can avoid seeing them.