I have guitar going in to input 1, then out 1 going to a pedal switcher and back into input 3, and then out 3 and 4 going to two amps
Can you provide more information as to what algorithms you have in Path 1 and Path2? If you are coming out of Path 1 via Out 1 only, whatever algorithm is placed there will be mono. You’d have to connect a cable to Outs 1&2 for the algorithm to function in stereo. The algorithms in Path 2 should be rendering a stereo output if both Outs 3&4 are connected. Is that not the case?