Hi, I found that I had to add foot and toe stretches, massages/rubs, and exercises every day. It makes sense that the feet would miss the exercise they used to get before the surgeries.
I searched online and I think the wikihow exercises were easy to find and do.
I also keep a tennis ball (and another squishier ball for when the feet ache) on hand and often just roll those around under each foot while sitting.
Lastly, which is a bit of a catch22, although my recovering knees loved lots of elevation, my feet needed me to sit upright with them flat on the floor (90 degree if possible) sometimes to let the blood flow back into them.
Hope you are feeling better.