Just let it go. These are extraordinary times.
If the restaurant is closed, the kitchen is also likely closed and room service won't be an option. Similarly, you're unlikely to find another nearby property or even a restaurant that offers more services.
As far as asking for a credit ... properties in the Houston area are running at under 10% capacity currently and that's going to continue for the foreseeable future. I suspect that's true nationwide, if not worldwide. They are under plenty of pressure and, IMHO, don't need someone whining about some temporary reduction in entitlements.
If they’re under 10% why are their prices still high? I’m trying to book a stay in Houston at either the HR by the Galleria or Downtown and both are $120+.
I’ve seen their rates both under $100 in the last month so guessing they don’t want business that badly.
Anyways OP was able to resolve it with the manager, which I think is a fair resolution. Though nearby restaurants may be closed for dining in I believe 80% or more are doing carry-out right now.