CEPA. HKSAR signed it with China.
That is the autonomy Hong Kong wanted.
And then you start pointing fingers at China for leaving it out.
It doesn't need to be a country to sign an FTA but countries like to negotiate to their own benefit first. That may include queuing up those who are important first. The ones which they stand to gain a lot more from.
No one is going to make China wait. Unless they are stupid.
The ones who can afford to not have an FTA with China will be ones like Russia, USA, India...