You mention a general problem. It appears across disciplines- been there and am there myself.
The real challenge with not having an immediate access to any program is that if you stop doing anything for any length of time you will lose muscle and cardiopulmonary fitness. People are going home sooner after surgery. They should have a game plan.

If a program is NOT available, an intermediary level of care should be introduced, whether it is a home exercise program, video guided program, etc. I led classes virtually during covid with seniors. It can work. It just needs to be designed and applied to people post event (whatever it is or could be).

I worked in cardiac rehab and had some great success stories! One lady was diabetic, had quad bypass, stuck with the program for a year (figure out how that was paid) and was non-insulin dependent at the end of that time!