You would need to contact your local Apple Store to find out.
No one here knows Apple's policies on engraved Apple devices.
As far as getting the proper, older, original 1st gen Apple Pencil for this new 10th gen iPad, you, alsp, need to purchase Apple's new $9 U.S.D. USB-C to Lightning adapter.
Tap the online Apple Store link below.
USB-C to Apple Pencil Adapter - Apple
You need to/MUST purchase this new adapter to be able use ( charge and pair ) the 1st gen Apple Pencil with the new base model 10th gen iPad.
Good Luck to You!