So the real news is only four Republicans broke with Trump, nowhere near the 2/3 or 67 votes it would take to force through legislation overturning the ban and overriding a veto....
However, it is easy for them to posture in advance of legislation, then become spineless linguini what it's time to stand up, vote and be counted. Just look at Obamacare repeal -- seven years of posturing, chest-thumping, and braying about repeal. That got us the House, Senate, and Presidency. But, when it's time to do the deed, they all turn tail and run.
I harbor no doubts that if legislation is introduced to prevent mentally ill trannies from serving from the military it will be solidly voted down. If a miracle happens and it passes, it'll be challenged in the courts for years. Our "side" works against us and the serious interests of the nation time after time after time.