Before you wear your Oculus Quest 2 or Quest with glasses, check to make sure the width and height of your frames are the following sizes:
Width: 142mm or less
Height: 50mm or less
Once you've made sure your glasses are the right size, insert the eyeglass spacer into your headset to provide a larger fit.
To insert the eyeglass spacer:
Gently remove the facial interface foam from your headset.
Take the glasses spacer that came with your headset, and attach it to your headset by pressing it into place where your facial interface foam just was.
Re-insert the facial interface foam back into place on top of the glasses spacer.
When you put on your headset with glasses, put it on from front to back. When you remove your headset, pull it forward and then take it off.