I had ankle replacement surgery about 11 years ago. The outcome was good and it helped me be able to walk much more than before. It was a rough recovery similar to knee replacements but given time and exercise / PT things got better.
Back then my surgeon said that ankle replacement is like knee replacement, just upside down!
My ankle problems were related to a bicycle accident years before.
When I had the surgery the protocols were still being developed here in Minnesota. That of course has changed with time.
Now in my mid 70's I probably will need a revision on the ankle since some bone spurs have developed.
I haven’t looked at it for a long time but there is a big ankle replacement group on Facebook that might be interesting.