Does 4iiii or Stages make a power meter for Shimano GRX RX600 cranksets?

Unfortunately, 4iiii and Stages do not make a power meter crank arm for Shimano GRX RX600 cranksets. This is because RX600 crank arms have a channel that runs down the backside of the crank arm and it’s therefore not possible to bond a power sensor to the crank arm. Please see the image below.

Shimano GRX RX600 Crank Arm

However, the good news is 4iiii and Stages both make a RX810 power meter that is 100% compatible with RX600 cranksets, which we discuss here: Will the 4iiii or Stages Shimano GRX RX810 Power Meter work on my GRX RX600 crankset?