Is gua sha effective for sagging skin?

There is something I didn't notice before but am noticing these days while applying lotion.

I felt like the pork neck was a bit saggy.

Does it feel a bit early for my age? Whenever I get an InBody scan, it always shows dehydration; could that be why my skin is sagging?

I'm also curious if using facial gua sha is effective for stretching.

If it is effective, I want to do it consistently even if it is a hassle.