I always wonder with threads like these and people like the OP, would your life feel immeasurably better if thos woman were at home unable to do a thing, struggling to afford food, really suffering in addition to having poor health? Because why does it affect you so much that she has a few nice things that she posts on social media?
The amount of money she has and what she does with it, makes zero difference to your life so why does it affect you so much? If she won the lottery tomorrow, it wouldn't affect you at all. If she became bankrupt, lost her benefits and was homeless, it would make no difference to you, so stop letting it concern you.
I will say I am someone with ill health, I dont post on social media but if I did you would see a couple nice things every now and then. You would even see this year a nice holiday. That holiday is being paid for by a family member. What you won't see is how in the last year ive left my house under 10 times, most of those have been for medical appointments. Aside from that I have been out a couple times because my health has been so bad I'm pretty much housebound and struggling so bad, my mental and physical health are dire. But you would see a holiday post and be jealous. However I doubt you would swap lives, especially as that holiday where I would likely post lovely pictures, I will probably get 1 or 2 good says in those 2 weeks because the rest will absolutely wipe me out and I will suffer for those 1 or 2 days.
Stop thinking from a tiny snapshot you know everything about a person. Focus on your own life and not other people's, especially when the state of their health, wealth and day to day living dont affect you at all.