@Ponny, here is what several of us do if we need to use lists beyond the point that Scrivener will be sensible with them:
https://forum.literatureandlatte.com/t/how-could-one-get-the-lists-to-work/126988/10?u=narrsd
It notes at the bottom that Word itself is not perfect with indented lists…this is no simple ability to get right. As in many supposedly easy and transparent aspects of word apps, which I seem to remember Apple punts on by not giving all the automatic abilities.
If you don’t have Word, probably one of the open (Open, Libre offices, etc.) versions probably will let you work as described above. You might report back if you try that…
Best fortune…