I am using this one here: Bphuny USB-C Headphone Adapter and Charging USB Type C to 3.5 mm Aux Audio Adapter Hi-Res DAC Support 60 W Quick Charge Compatible with Samsung Galaxy S22 S21 iPad Air 5/Pro 2021, Pixel 6/5xl: Amazon.de: Electronics & Photo
However it is not available anymore. Temperature is ok even while charging, and the sound performance is pretty good. My Fiio BTR5 2021 is still doing better IMO in sound performance, both with BT and wired but of course it lacks the charging option when being used wired as DAC.