Quest integrated audio and microphone are not a very good in social experinces and could use improvement
The headphones are Quest are HORRIBLE for social gaming because the mic pics up game audio and echos it back. Rift S and Quest users in games like Rec Room or BigScreen can really harm the overall experience because the feedback/echos are so distracting.
Push to talk would be one simple method to reduce this problem.
However, I think you need to implement some intelligent noise canceling otherwise the integrated headphones really harm social VR for everybody.