Do you have a community neurological team including physiotherapists in your area. I am fortunate in that I do (South coast so not much help if you don’t, sorry).
Where I am the physio will visit and devise a program of exercise.
However, I am I think in much the same situation as you. I can only walk a few metres, and that’s with the help of FES and a walker, and even then I’m leaning pretty badly on the walker. I use a wheelchair most of the time, can transfer but make heavy use of grab bars and frames.
If I fall, I haven’t a chance in hell of standing. I had an infection a few months ago and my knees just gave way suddenly twice. The first time, my OH and I tried to get me up, but failed, so had to get paramedic help. The second time, we didn’t even try, just dialled 999 straightaway. They had to use an electric blow up cushion thing to get me up.
I fall very rarely mostly because my mobility is so limited, so I don’t do things that are unsafe.
I would love to be able to get off the floor once down, but I think it’s beyond the help of physiotherapy.
I hope you find the help you’re looking for. Would a referral from your GP help you to get a physio who could visit you?