I "had" cold hands and feet all my life. People used to call me a "cold fish" as a child and young adult as when I held someones hands they'd feel cold to people. My normal BP during that time and early ME years was 80/60.
In my first years of ME. I developed Raynauds bad during winters (at times I couldnt drive a car due to no feeling in my fingers which made them very hard to move) and I also had several bad episodes of chillblaines in my toes to the point I couldnt go to work as I couldnt wear shoes (so then it became a safety issue for my job). Note I still suffered from low BP during this time.
The only way I could wam my hands and feet was via external heat.. putting gloves etc on didnt help at all, I had to apply direct external heat all over hands or feet (and it would take a while to warm them too) eg warm water was the common way I'd warm them up.
This has all changed, I no longer get Raynauds and havent for years now, I no longer get chillblaines. What is different is my BP changed and I think this is what has shifted things for me eg the chillblaines, the Raynauds and the cold hands (my hands now feel warm to people and myself). After years of low BP with ME (and low before that during childhood), when I had a full remission for a few years but then crashed again.. my BP was very different this time round.
My BP was even a bit high with my ME there for a while even with sitting (prehypertension) but now days when sitting its usually good, issue is it now swings badly eg it can go 197/136 on 1 min of standing .. or it can on more rare occassions ditch on standing 60/40. When Im laying my BP can be getting on the lower side. (So my body is almost doing like the disorder called "pure autonomic failure" but in an opposite way to what they do as mine usually goes high when upright and low when laying).
Anyway, if you are looking at these symptoms I think you need to check out how the low BP is involved in those who have cold hands and feet. I still have low blood volume thou (often end up in hospital having to have a saline IV) thou Im now a "warmie"

beautiful warm hands and feet now.
It my case it seems something to do with the BP rather then just the low blood volume (thou that may also have played some part in the issue before).