At the beginning of the pandemic, security concerns prevailed downtown as people living on the streets suddenly had no access to shelter or municipal washrooms and tried to access private facilities.
In addition, the ongoing requirements for extra sanitization are time consuming, costly and an increased health risk for staff (and really, would require a full time bathroom attendant for busier places).
I would suggest that one should assume there will be no washroom and plan ahead.
Go to the toilet before you leave the house. Eat or drink after you run errands. Have things delivered if you must always be near a bathroom. Call ahead to inquire about facilities if you have a special medical need and the trip is unavoidable.