Same issue here with Sram Force AXS. coming from Dura-Ace 9000 Mechanical I decided to venture into Wireless shifting and disc brakes, the cheaper option nowadays is a complete bike. New Scott Addict with Force AXS, on the first ride the noise from the rear cassette was awful, put it down to adjustments needed, everything looked fine, second ride again noise awful whatever gear you are in and chain drop shifting from large to small chain ring.
Google the issue and its seems I`m not alone, so I decided to take a closer look at this.
Removed both mechs off the bike, as its a factory job, they needed a complete refit, followed the instructional videos and spent a good few hours checking everything. cleaned the chain and applied Fenwicks professional lube, now runs perfect and silent.
In summary a total refit and setup of the mechs and Fenwicks lube.
Hope this helps others out there with this annoying issue. but when it comes to replacement cassette, chain and rings they will be Red AXS !!