By any chance, do you have a link to her ebay?
This is similar to DMOR9. I have a note on it here http://fruitsandgardening.blogspot.com/2020/12/himalayan-mulberry-dmor9.html?m=1
The cuttings are at my sales site reallygoodplants.com
This mulberry does not root. You will need to graft it.
Ops. Just realized that you are in EU