@copsham it's not impossible to get a therapist who can address your foot with your hip in mind. But, at least here in the US, they are required to address the issue for which the PT was ordered.
Here's my experience:
In March I badly sprained my ankle--did everything but break it. I went to Urgent Care, and the dr there recommended PT. There just happens to be a PT office right next door to the Urgent Care office, so, using the extremely discerning criteria of "It's close to my house", I signed up for PT for my ankle at that PT office. Now this was in the midst of my pre-THR research (which, incidentally, is on the same side of my ankle sprain), so I explained my situation to the therapist who did the intake for my ankle. He did say that he prescribed some exercises that would be appropriate to work both the ankle and the hip.
The day I was to be discharged for the ankle, I walked in to that same PT office with new orders (from one of the OSs that I had 'interviewed' for the position of "He who is to replace my hip"). These were orders for a pre-hab of sorts, working the hip to (in my mind) solidify the idea that it needed to be replaced, and to prepare as much as possible for the probable operation. Again, I think that my ankle was taken into consideration, but the focus was definitely on the hip this time.
I also went back to that same office after THR (with a third set of orders from a third doctor). I'm happy to say that my ankle is pretty much a non-issue. And I've been happy with the care with which the therapists have addressed my various 'issues'. I think it has helped to have the ability to have such continuity--the same therapists before and after surgery.
United States
