The answer is YES - A STRONG YES
The kidneys are affected by the pressure and sugar - both of them have to be treated properly. their values to be maintained at near normal values as far as possible.
That is the only way to slow down further kidney damage - which however is likely to progress over time. You need to check kidney function on and off.
Establish rapport with a good nephrologist
(Kidney specialist) - he is the one to follow her in the long term