Lol, of course the whole show starts with him removing his clothing! As always, the opportunity to get their histrionics on is really what this community is all about I'm honestly not the least bit shocked or surprised.
I'm in the US and I don't believe there needs to be a "ban" on service members who identify as trans bc it is completely irrelevant. As with anyone who wishes to serve in the military, you need to meet a certain physical criteria of combat readiness. Heck even having flat feet can disqualify you from serving. So if you're coming into the military with some "condition" that "requires" a ton of medical interventions that should automatically disqualify you anyway as it impacts your combat readiness.
Additionally, we're all pretty much accepting at this point that when it comes to physical activity biological sex matters. And serving in the armed forces is primarily about physical activity and about physical bodies. So if you're a male and you're doing things to your body that decreases your combat readiness obviously that would disqualify you. If you're a female and you're taking medication that can have a negative impact on your physical and mental health obviously that would disqualify you. And certainly the armed forces should not be required to provide unnecessary, voluntarily medical treatments to anyone - especially ones that DECREASE combat readiness.
There's no need to ban anyone simply state that when it comes to military service you will be identified, housed, classified, etc according to your biological sex and if you have medical requirements or demands that negatively impact your combat readiness you're simply not fit to serve. Otherwise what you do, call yourself, etc out of uniform is your prerogative.