I am pleased to see detransitioners both raising the profile of their stories, and the harms done to them, and offering support for each other. I'm not clear on what his pathway will offer though, and whether it might form a model for NHS services.
For the NHS, there was a recent consultation on detransition pathways - IIRC it closed around New Year. Detransition also referenced in the Levy Review. So I think it is harsh to have expected a fully fledged service to be in place by now. Particularly as the 'pathway' is not clear - every detransition case is so individual and reasons for detransition can vary a lot, so any kind of pathway (or psych/medical support) would need to be extremely flexible and individualised - and how to scale that, and where to host it... I don't think it is simple.
It also puts the NHS is a weird position of offering a treatment that they know some patients will then require other NHS services to reverse (or support the harms from). I can't think of any equivalent medical services. That will be an interesting circle to square.
Anyway, good luck to the gentleman in the article and I hope whatever he is planning is helpful and can provide some insights as to what services detransitioners most benefit from.