Not sure which developer to contact regarding this.
I bought the AFM G5 instruments and according to the manual supplied with it I says that it is compatible with REP. I downloaded and installed the REP into their included modded 172 with the G5. I went through and enabled the package. But after a few times starting X-Plane I've noticed that the static object like the covers, chocks, and tie-downs are invisible and I'm never sure what's going to happen when I start the engine. I tried searching this on Google and found a support thread from 2017 that blamed the invisible chocks on the plane being from pre-11.30. I have also posted this on the SimCoders official support forum.
Thanks,
KDTW Flyer