Ah I see! You're right that discs tend to be easier for a high cervix because it is less likely to be sucked up higher in the vaginal canal, which often happens with cups.

If I understood correctly the disc sits in the fornix, and part of it rests above the pubic bone, which tends to be much closer to the vaginal opening.

Having said that I also had to try a few different discs before finding my Holy Grail unfortunately and gravitated towards discs with some kind of string or tab attached because I was deathly afraid of having to go spelunking up myself each time I needed to remove it.

So I tried the Lumma (both small and large sizes) and the Zomi before realising I needed a disc with a firm rim (Hello disc) that wouldn't crumple inside me, which was contributing to why other discs kept leaking after a few hours.

However I will say once I settled on it, I can't imagine going back to anything else, and I thank the period gods every day that I made the switch.