The cost of her jewellery is obscene, even if she's making huge amounts of money. She would be stupid to spend £100k- 200k on watches and jewellery, especially without having invested it in a home, and she may have a potentially short career.
I'm convinced the majority of her jewellery is replica. It's easy to buy good quality 18k gold and diamond replica Cartier and VCA etc. jewellery from China. Costs 10%-15% of the real thing but it looks almost identical.
For certain "in demand" or "rare" pieces you may need to build up a profile with a SA to be offered them. How did she build that in a year?! Also, she overshares and is flash so if she had boxes for all of those pieces she would have them all displayed together on the gram.
Note - I know about this as I was years begging my Van Cleef SA for a turquoise motif bracelet. Got fed up grovelling and bought one when I was in Hong Kong. Bad I know but it looks the same!!