How to fix glitchy graphics in PGA Tour Golf Arcade after Tahoe upgrade?

If that is the only game affected, you need to continue working with the developer. It is their responsibility to maintain compatibility after Apple system software updates. There is a long history of smaller developers being slow to react to macOS and even Windows updates.

Have you visited the website of the game publisher to look for game updates and/or compatibility information?

Has your Tahoe version been updated to 26.2?