Highly likely Meghan has products to launch for her brand, all these things would have been well thought out and under production for months and probably sent to stockists etc by now. How would this have anything to do with whatever Kate's doing?
Even if Kate was lovely to Meghan and they were in touch, I highly doubt Kate would expect Meghan to stop everything she's doing to put food on the table for her children because Kate's suddenly unwell or possibly having marital problems.
"High Meghan I am going to have a planned OP in January and intentionally publish a photo without my ring, please don't do anything to overshadow me"