Hello everyone

Im probably repeating an already explored topic sorry for that but having read the threads a bit Im still confused.. so any advise would be highly appreciated.
I have already been in receipt of Universal credit for the last 2 years.. although i had a lot of health symptoms i didnt share them with DWP nor had I any concrete diagnosis.
But last april i was diagnosed with FND plus other things and now awarded standard PIP for both daily and mobility (although asking for reconsideration of the level)
PIP was backdated to when i applied March 23.
My questions
1- Can I apply for LCWRA too ? i read that after 2017 you cant claim LCWRA while on UC ?
unless you were on PIP .. but I wasnt on PIP when i started receiving UC..
2-I was affected by benefit cap- will DWP pay me the difference from the date i was awarded PIP ?
Thank You