@Spex10 I've just read through your recovery thread and oh wow, you are having a rough old time of it. My experience is very different to yours yet still l landed in the ditch, face down. All credit to you for not giving up even though you must surely feel like it. Not really an option though.
I was fortunate, too, that l had a LTKR. The month before my op l changed to an automatic car because l knew that being stuck out in the woods and unable to get out would drive me crazy. I'm aware that you have a right TKR but l wonder if there is anything out there, perhaps via motability, that would at least enable you to get out and about, pro temp?
I know you can't bend your leg very much yet. Neither could l when l first broke it. The bones were shattered and the ligaments, tendons, whole of the knee was knackered. I was incarcerated and non weight-bearing for three months. So l swapped to an automatic. I had to slide the seat right back then park the leg up on the passenger seat but that wasn't difficult.
Incidentally and hopefully by way of encouragement, my leg was potted up for three whole months. I couldn't weight-bear, exercise - nothing. I couldn't even live at home during that time because it was an old-fashioned 3 storey terrace, bedrooms on floor 3, bathroom on ground floor. Nightmare! When the cast finally came off my leg was wizened (and horrendously hairy!). Point being that despite being totally immobile (and wizened!) l was able to regain mobility and bend in not too long a time.
I truly hope this will be the same for you whether with MUA or without.