OP, I think it will take far more than a few years and a case or 2. We're very much in the 'end of the beginning stage'. And many countries haven't even reached that yet.
Sports are increasingly recognising reality. The UK has made some progress on prisons, and that should now accelerate after the SC judgement. Lesbians and single sex services have the law clearly behind them. The 'trend cohort' is starting to age out of schools, and some of the university-ish ones will mature out of it as they finish growing up. The medical aspects are finally getting some proper research.
But.
A lot of people have huge amount invested in this. The 'Japanese soldier' parents. The many who have built their careers and organisations around it - the lawyers, academics, some politicians without the mental flexibility to quietly pivot, the rape crisis and NHS leads who reshaped entire services, the medics and therapists, the ones training schools and workplaces - they won't just let go of the cash, and they have another few decades in the workforce. Plus admiting fault could see some of them hit with expensive/career-ending lawsuits.
There are children from the peak wave who have gone - or been pushed - too far down the medical rabbit hole to retreat. Some will sue the pushers but others will dig in, and in a couple of decades will be of an age to be in positions of power and influence.
And those other countries? Ones that have brought in full self-ID, ones that have changed constitutions to remove 'sex' in favour of 'gender' will find it far, far harder to change course. There is too much to unpick, too much risk to the state of admitting fault, the words to challenge the problems are lost.
And misogyny and homophobia seem likely to be permanently with us. The forms will vary, and their power will wax and wane. But every step forward against those comes with pushback, and we're not going to win in just a few more years what's taken centuries to get as far as we have.
So, not the end. Not the beginning of the end. But progress. The growing desire for proper medical research will help, too, but that's a slooow business.