Possible to link my FF number to P2’s mile earning cards?

Hi guys, I was wondering if anyone knows if there’s anything against linking my frequent flyer number to my P2’s mile earning credit card accounts without being an AU. My P2 has 50k Capital One miles and I have 50k Amex UR points but I need 70k points to book the flights I’m looking at. Can I link my FF number to P2’s C1 card to combine miles in my airline account to reach the 70k threshold or will this cause issues between the airline and the credit card? I’m having a hard time finding a direct answer for this scenario so any help is appreciated, thanks!