Beats Studio 3 wireless missing screws

You can actually buy a set of screws on eBay for very little ( about the cost of 2 cups of cappuccino) .

These may be the ones that are missing: https://www.ebay.co.uk/i/282972360335?chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=282972360335&targetid=908661474856&device=c&mktype=pla&googleloc=1006965&poi=&campaignid=10199419108&mkgroupid=101401893105&rlsatarget=aud-629407026665:pla-908661474856&abcId=1145983&merchantid=115018777&gclid=CjwKCAjwydP5BRBREiwA-qrCGr3lPAcKmmjmsKWHtdJSFGXH41BUaKSWevfrhQ9HwxKulsVAszEDqxoCCP0QAvD_BwE

I don't know where you are, but these are UK prices. I would suggest getting some thread locking fluid, usually blue in colour. A tiny drop will stop them coming out in future.

https://www.ebay.co.uk/itm/Granville-Lock-Thread-Locking-Fluid-3113-Nut-Bolt-lock-10-ml-Medium-Strength/281888065423?epid=2074009551&hash=item41a1d6878f:g:MAgAAOSwUdlWcp0g

I have the same exact experience with my Beats, after a year of use. I checked out the comment below, and the problem seems fixable so I'm buying these: https://www.amazon.com/Replacement-Headband-Connector-Compatible-Headphones/dp/B07VDHPJ8Q?th=1

I hope you were able to fix your headphones!