Is SRAM RED AXS Power Meter, 48/35T compatible with Tarmac Pro Disc – SRAM ETAP
Yes they should be compatible - the difference is in the materials/manufacturing:
SRAM Tech Support - Difference between Force/Red AXS

However, you can upgrade your Force AXS crankset to have power:
SRAM Tech Support - Adding power to Force AXS crankset