I wish to upgrade my bike with the "SRAM Force eTap AXS 2x12 Upgrade Set"; this set would include the derailleurs and levers. The thing is, my current Shimano Ultegra 11-speed crankset (FC-6800) has a left-sided power meter that I would very much like to keep.
What are my options? Will this crankset work with my new 12-speed setup and a 12-speed chain?
Also, can I keep my Shimano Ultegra rim brakes?