Hehe, I like your thoughts, but here's mine :
So, I think the photo is edited. Heavily edited. First of all, if she got surgery, she couldn't have gotten it during the quarantine, even if quarantine has opened up in the last few days. Plastic surgery is a long process, it takes a few days for a consultation with your doctor, then you go in for surgery at a later date, and then you have to recover for a pretty long while (and especially for something as altering she did, it'd be a few weeks).
Here's my second, less put together thought. The caption from her Instagram post says "under (insert bad word)'s skin". And then in the picture I linked, you can zoom in on the necklace. If you look to the left of the butterfly charm, you see the chain is blurred out/missing. THIS can be interpreted as the part of the necklace being under her skin.
Also, I don't know why I've been so occupied with this the past few days, but like. idk.