Same issue with my 2020 Montana 41 ft fifth wheel trailer. So installed a 12" extender to attach my bike rack to keep the bike handle bars from impeninging on the trailer.
Most bike rack manfacturers do not warrant their for fifth wheel trailer use due to the risk of failure resulting from cantilever induced bending of the bike rack hitch.
This rack can carry two 66 lb bikes and is approved for fifth wheel trailers:
https://www.etrailer.com/RV-and-Camp...ima/Y36FR.html
I have a Swagman XC Hitch Mount Bike rack model 49401, which is designed to carry tow (2) 35 lb bikes (not electric bike), and secured it with a anti-rattle hitch tightener stabilizer. Bikes weigh 31.6 and 38.5 lbs. I load the heavier bike closest to the trailer.