My Mom is Type 2 Diabetic and has Hypertension. Can she take Supplements?

[Kian23]

My Mom has type 2 Diabetes from over a decade. Also, she is patient of high blood pressure. She is on bloog sugar medications like Metformin, Glimipride and Telmisartan, Amlodipine tablets for high bp Daily.
Now, she has many complications of Diabetes including Diabetes Neuropathy, eyes issues like cataracts, osteoarthritis etc. she also has complications in her back/spine.

Now, her doctor has not recommend any special multivitamin apart from diabetic die,t. Now, my question is tnat can she take the following supplements on her own:-

Vitamin C
Vitamin D3
Vitamin E
Omega 369 complex capsules
Coenzyme Q10
Magnesium
Vitamin B2
Lutien for eyes.

She will start these with low potency? Can this harm/hurt her diabetes in any way?

Thanks!