Don't really come on here much just read all the articles
Ref two bar on a UK niro
It was never had type approval in the UK for some reason
If fitted in Germany etc you will find it also has upgraded brakes and a second fan for
The electric motor .
So I would think it is not legal as never approved possible here
I would check with kia and your insurance company
Faults and Technical chat for the Kia Niro