So took my pajero with steel bumper and lights and roof racks with Sharjah plates to get inspected at motor city tasjeel. Failed due to "off-road modifications only allowed with Dubai plates"
Went to tasjeel auto village in Sharjah and failed. Return car to stock.
Tasjeel Dubai gave me following advice:
Remove plates
Cancel registration in Sharjah
Get export certificate to Dubai
Inspect within 24 hours in Dubai,
Register with new random Dubai plates.
Went back to motor City tasjeel, Passed without issue. Seems like Dubai plates with steel bumpers,rock sliders etc are no issues as long as combo above works.
Used some rubber bumpers with double sided tape to put on front of bumper for inspection and removed once I picked up from carpark
Good luck to others needing passing 🙏