I think some people have been so invested in the conspiracy theories they can't accept the facts anymore.
I said a few days ago that I wondered what they would do when she did appear in public looking pretty much like she did in THAT photo.
It appears they are so far down the conspiracy rabbit hole they're now stuck.
She's slimmer clearly (not surprisingly) but not really any different. The truth is often too boring for those who need conspiracies - she had abdominal surgery for an ongoing medical condition and has been recovering (likely with OT/Physio/dieticians etc) at home. She hasn't had a face lift (she didn't need one, but if she did get one KP would never have specified the abdominal surgery).
She now feels strong & well enough for a short shopping trip close to home. She'll be back fully at Easter.