Safe to microneedle/derma roll with PRP 14 months post FUE transplant to crown & front of head?

Hello, I've been hearing some conflicting answers, and would like to know if it’s safe to the transplanted hair follicles to have a microneedling/dermaroll with PRP/stem cell treatment done at a DR’s office? I’m worried about transplanted follicle damage. The transplant helped hair density, but it still looks thin and I'd like more improvement. I don’t live near my surgeon anymore. Should only needle injection be used with PRP instead of a dermaroller? Appreciate your advice!