Also - nobody seems unduly concerned that (eg) a Catholic would go around telling all non-Catholics they will go to hell. People navigate 'being polite at work' all the time.
Obviously if someone deliberately ordered a pork meal at work, for a number of people including a Jewish person with no choice allowed, that might well be harrasment. But that is so far away from normal workplace etiquette that everyone would know that would be ludicrous.
I feel (as I have also heard on here) that 'but what if someone misgenders' is framed to put women in an aggressor position.
The actual difficult question is 'what should an employer do if a Muslim woman knows that work policy is to allow transwomen to use the ladies and objects'.
Or 'Should an employer knowing that there are Muslim women in the workplace, write a policy saying transwomen are free to use the ladies, without telling the workplace in general'.