If she keeps it all in good condition then she can resell it. The units in LA, like the one she is renting, have a ‘community’ feel that you don’t really get in the UK, so I think it would be much easier to sell the furniture to the next tenant or someone due to move into the building.
I’m interested to see is how this move will impact her income in the long term. She is probably hitting a peak now because everyone (including me!) wants to see her new apartment etc. but, I always end up unfollowing people when they move to hot countries because it’s a) depressing to see when you’re in darkness at 4pm and they’re posting smug photos on a beach every day and b) it’s just not relevant anymore. Her recipes for example, will be a lot harder for people to follow due to the difference in produce available and brands. The time difference will have an impact on her ads/sponsorships reaching the audience and all the influencer events she attends are in the UK.
I would bet the overwhelming majority of her followers are in the UK, so it’s a big risk to her income to move from that market.