I didn't realise the op, was aimed specifically at trans, I thought
It was meaning LGBTQ pride flags and motto's in general, to be honest I didnt know they had a separate flag. But it wasnt my point tho, it doesn't really matter which cause or social issue or any of that which it is, and i totally agree that far more does need done about the issues you mention, but this is one of the problems tho, the police, just like the courts, are meant to be as completely unbiased and neutral as possible, but when one thing starts being represented but not another, then the other group, or another group, will start saying; "why are you addressing this but not that?", or "why are you giving this more support then our thing?" It can bring their credibility into question, sow more seeds of tension and inequality, into institutions that already have enough of that to sort out already. It needs equality and fair treatment, of existing groups that are treated unfairly and unequally 1st, without appearing to show favour for another issue, or side of an issue. It just gives potential for more polarisation. When theres civil/social unrest that causes disturbances, the police are expected to be the ones that show up, and bring things down, return order, in as peaceful way as possible, but if one group (right or wrong), see's the police as siding with the other, or taking a position then there's already the potential for another layer of confrontation there from the outset. I dont mean any specific group, agenda, or issue, but I just think this is why the police need to be as much of an anti-catalyst, in this regard as possible. Especially these days when tiniest little things get blown on social media. Like when a member of the royal family had the leaves on their poppy pointing the wrong way, and suddenly Twitter was on fire!