@Whatnown , I think the problem is twofold:
A) The issue has become polarised into 2 conflicting 'sides' (trans rights activists vs gender critics)
B) There are several different groups caught up in trans ideology. Yes, some of them are adult men who are AGPs and/or are predatory. However, many sincere trans-identifying people are themselves vulnerable and not aggressive or predatory
Inclusivity training will emphasise the vulnerable sincere trans-identifying people and claim that gender critics are bigoted meanies for oppressing them
I think if you go straight in with talk of AGPs and predators, there's a big chance your friend will mentally classify you as one of those bigoted meanies and won't engage with any further discussion
I agree with PPs that you need to take a softly-softly approach which focuses more on exploring doubt and compromise. You could say you are happy to use people's preferred names and pronouns, but that maybe there are issues with other things TRAs are asking for such as men being put in women's prisons. You could acknowledge that some trans-identifying people are sincere in their beliefs, but wonder aloud how we can stop men who aren't sincere from cynically taking advantage of the opportunity to enter women's safe spaces. Most of all, you can ask your friend what they think in a spirit of non-combative exploration: "Do you think people can change sex?" "Do you think there are any issues with replacing sex with gender identity?"
Remember, you're not crazy. The biological definition of men and women is both scientific and (in the UK) the legal one. It's crap that you have to pussy-foot around when talking about this issue with your friend, but if you want to keep her as a friend and possibly change her mind you will probably have to hold back a bit