I love yoga - and I do mean LOVE it.
But I was advised to stop because I have hypermobile joints. And I must admit the joint issues have been better since.
But I miss it. A lot.
I'm hoping that as age stiffens me up, I will be able to return to yoga (hatha)
And anyone can do pranayama, no matter how limited their movement.
If you look into the history and different 'branches' of yoga you will find that there are yogic practices to balance, harmonise and benefit almost everything, so there will definitely be practices that are considered to be beneficial for diabetics.