I seriously doubt 'safer schools' are a genuine safeguarding organisation. I think it's one of those cases of 'identifying as' something that you're actually the opposite of.
This seems sadly common these days.
It's a safeguarding fail to even produce a guide about furries for kids. Age inappropriate - which is something you're not supposed to do quite explicitly stated in Keeping Children Safe in Education the Statutory safeguarding guidance for the UK. So this sounds to me as if it's breaching that Statutory Safeguarding guidance.
However, I don't think there's a single teacher who's so lost control of all reason that they'd actually use this. Apart from anything else, there really isn't the time for this rubbish, teachers are struggling to catch children up in the basics like English and Maths after Covid and the profound underfunding and lack of Maths teachers. Such a deep lack of understanding of children and schools (that it is purporting to be targeted at) that it almost seems deliberate.