Quest 3s Headphones?

EddZilla  you should be able to connect blutooth headphones to the headset, but there may be some audio lag unless you get recommended headphones to reduce this. You can also connect USB-C headphones to the headset but you may need a USB-C splitter with power delivery if you also want to charge the headset with a battery headstrap and use the headphones at the same time. You could also use a USB-C to 3.5mm adaptor and plug in 3.5mm headphones into that.

https://www.amazon.co.uk/soundcore-P10-Wireless-Gaming-Earbuds-White/dp/B0B9MMJXRZ

EddZilla  additionally a USB-c splitter with data passthrough will allow you to use the headphone adaptor and charge the unit at the same time.

NexiGo Type-C Adapter for Quest2, Dual Input Ports, No Latency for Data Transferring, Compatible with VR Headset, PC, and Laptop: Amazon.co.uk: Everything Else

USB-C to 3.5mm audio jack with USB-C power passthrough for use with battery headstraps and headsphones - cheaper versions are available.

Amazon.com: USB C to 3.5mm Headphone and Charger Adapter, CableCreation 2 in 1 Type-C to 3.5mm Audio Hi-Res with PD Fast Charge, USB C to Aux with Charging Dongle for iPhone 16 15 Pro Max, Galaxy 24+, Pixel, iPad : Electronics