That mother sounds confused.
At my kids primary schools, there's a few murmurs about trans people but the gingerbread guidance was thrown out and single sex provision is enforced. I don't know what it will be like at secondary but most of the teenagers around mercilessly take the piss out of melodrama. Non-binary as a fashion accessory will fade away in time.
I think we are seeing the peak #BeKind now - everyone who grew up with this or encountered it at university, going into the workplace etc. I hoped Keira Bell's case would ring alarm bells, but I think it's going to take a class action suit to really nail it home that it's not appropriate for kids.