This ⬆️
I'd break it down into 3 levels:
- virtue signalling and ignorance of the underlying risk
The majority of people will likely be in this group. Most won't take it any further than pronouns in their bio to show their virtue - they'll engage if the conversation comes up but will quickly pivot to "it's all so very complicated". For the teachers that are in this group, some will likely think themselves to be better "educated" and/or more understanding of what really matters than the fuddy-duddy parents who can't get to grips with modern life and/or are afraid of their child growing up.
- Activism
This is the next stage, for those that really do believe that they're in the right. They won't disengage with the conversation, they'll actively lean in and/or start a conversation at a theoretical level and will actively champion examples of trans people to inspire children. They want to save children en masse etc. They won't see the line between activism and grooming, because at a societal level there isn't one: it's mass indirect grooming, similar to how a paedophile grooms the adults first (so that the adults reassure the children about how great the person is). For clarity, I'm using paedophilia here as an analogy to describe grooming behaviour, not to say that anyone who is part of trans rights activism is a paedophile.
- grooming
Speaking directly to a child in attempt to get them to recognise that they might be "in the wrong body". Again, for clarity, I'm not suggesting that teachers who groom children into believing that they might be in the wrong body are paedophiles. I suspect the vast majority think that they are genuinely saving children from bigoted parents.
Pretty much all teachers in group one and most in group two would likely have this approach:
A quick. "I'm sorry." and then moving on would have sufficed. Like when a child is known by the second name and a new teacher inadvertently calls out the first name - a quick correction and that's the end of it.
But persistently asking is grooming. It can't be anything else. The motive for the grooming is immaterial if the outcome is that the child is encouraged away from their parents. I have met one such family, whose daughter was groomed away from them in a school setting. I felt both heartbroken for them and scared for myself and my daughter, given my experience so for with the safeguarding leadership team at my daughter's school.