My then 93 year old father had it done. It was no big deal. I believe he had to stay one night, but my memory is foggy. It's not normally open-heart, but done via a catheter inserted into the femoral artery (so you'll need to be shaved down 'there', at least on the one side, but perhaps both sides of your groin in case they need to access via that route at the same time). This makes it 'day surgery'.
https://www.healthline.com/health/heart/tavr-procedure
You'll get instructions and a date and time sent to you. Follow those to the letter. Ask questions rather than assume or guess. The worst part of any procedure is the unknown and expectations....meaning usually some anxiety. They won't hurt you. They want to wave good-bye with smiles all around. It's painless, although you'll lack energy and 'zip' for the next few days until your system recognizes that you're better and not in danger. Take your time and listen to your body. When you feel really well, you'll know it when you awaken that one morning. 😀