Are you using the right hand grip to summon the cursor and using the right hand trigger while holding grip to select dialogue/menu options?
I built the VR version using a Rift S on the same "project" the Quest 2 standalone version was on and I didn't have to change anything in the input settings to get it to work from Quest 2 -> Rift S when I lost my headset and stopped working on that standalone port and started working on a general VR port.
If you can't get it to work by holding the grip to summon the cursor then I will go pick one up right now to fix this.
Please feel free to request a refund.
I can understand how frustrating it is when something you paid for doesn't just work.
Thanks again for your interest in my game and thanks for helping me improve it. Your feedback is super important.