I think a law preventing the covering of your face in public, except for reasonable purposes, and time periods, related to specific jobs and activities, is reasonable and enforceable.
There may be some initial test cases to establish some examples of jobs and activities where this is required for specific times. Fine.
If some women are then prevented by a misogynistic cultural religious sect from accessing society then let's focus on and highlight the treatment of those women by that group.
We should have laws which establish our norms and values.
Religious groups who use laws to oppress women should then be shamed by wider society.
But we shouldn't make our laws to appease misogynistic religious groups treatment of women.