Another thing you can try.
Also, I suggest contacting/reaching out to Apple Product support and services, again!
Tap on the first link below and scroll down some to get to the Apple Product Support section and phone numbers for your location/region.
https://www.apple.com/contact/
OR
https://support.apple.com/en-us/HT201232
If you need to, if initial 1st tier Apple customer support is of no help to you, you can calmly ask to have this issue escalated up to more responsible, senior level Apple customer support employees to see if they can come up with other possible solution/s to this iPad/iPadOS/Apple Pencil issue, but I make no guarantees, whatsoever.
If need be, you can have this iPad/iPadOS/Apple Pencil issue escalated all the way up to Apple engineering staff supoort.
Even if no acceptable resolution, Apple, AT LEAST, logs all support calls and issues.
Best of Luck to You!