@Michelle R.
I don’t think the uses are too similar to have both. Especially since your center is more medically focused.
If the physical therapist “use language” violates the chiropractors “restriction language” then the liability would be on you the Landlord. The new tenant isn’t a party to the previous agreement between you and the chiropractor. But the chiropractor might try to pull the new tenant into the legal situation. And to let the new tenant into the center you’d need to get the chiropractor to lift the restriction language via a written waiver.
Restriction language is put in place to protect the tenant. If you think the physical therapists “use” violates the chiropractors “restriction” then you need to discuss that and potentially negotiate that with both parties early on in the process.
Negotiating restriction and use language within a shopping center is a very common situation. And in the rare situation can make or break a center. It needs to be handled by an experience retail lawyer.