Work injury then Treatments

I got injured at work in Ontario went on WSIB and got medical treatments in the meantime however when I came back to work after a few months met with the employer and the employer granted accommodating me however wanted to to get my medical Physio treatment outside work hours my question is can they do that ? Before work or after work or days off is what I was told .

Work injury meaning I get my treatments during work hours. I have family it doesn't make sense to go on my 2 days off to get treatments. Or late night after 12 hour shifts going to Physio.

Please any links or advise .