"no trans people were consulted"
Aha but the Trans groups all refused to take part. They could have applied. They didn't. It isn't that they were blocked - they didn't even try. This is very fertile ground for conspiracy it looks really bad.
So if you want to make a subversive, but not obvious argument turn this back on them.. Lots of pro trans people are suspicious of Stonewall Mermaids et al who have a lot of money but don't achieve much. Build on that say the terfs might have lost but Stonewall were traitors who were just after money and refused to do anything when they could have.
Point out Stonewall worked with big business and the Tories and major arms companies. Suggest their training courses were garbage etc. Trans issues were just a joke to them. So we have to disaffiliate from the antitrans Stonewall.
If Mermaids come up talk about the corruption allegations and the safeguarding failures reveled by trans staff members. Suggest Mermaids refused to take part because they are just money grabbers too.
Say their no debate tactic followed for years was suspicious and lazy they were never interested in defeating the nasty wims - they were cowards and they were actually just banking cash.
[If you are really rolling start suggesting these groups are being run by fake trans people cis infiltrators who are pretending to be trans while the "real" trans people are being betrayed. Start talking about AGP stuff. Tell them to watch White Lotus]
You could even bring in Agent Jolyon who every trans case he fundraised on ended in disaster. Is he working for the Terfs?? Why is one of his cases quoted in the Judgement to help prove biology is real.
Also don't forget to tell everyone the ONLY way to defeat the Terfs is by debating them and reading all their stuff so you can easily counter their awful weak arguments. :)