How to Wire Fantech FR100 in-line exhaust, venting two bathrooms with Two TopGreener TDHOS5 Humidity Motion Sensor switches
This isn't as hard as it looks

First off -- the TDHOS5 (which is an Enerlites product, by the way) has manual on/off tap-switches for the light and fan built in, so you do not need separate manual switches (in fact, having separate manual switches could be much more confusing than using the tap-switches).

Second, the required wiring for this is actually rather simple -- the humidity-sensor portions of the TDHOS5s are wired in parallel (wired-OR connection), while the motion-sensor portions are wired to independent lights, as in the diagram below.  One caveat is that when you're wire-ORing switches like this, one of the switches effectively needs to be on a switch loop (instead of routing switched hots independently from two boxes to the load) to avoid violating 300.3(B)/310.10(H) about wires in parallel.