Unable to connect the Pencil 1st Generation to my Ipad 7th Generation

If nothing in the support article posted by ProustGiulio resolves the issue, take a look at this discussion and see the reply from ApplesAreUs

Apple Pencil Not Connecting After iPadOS 13.5 Update

There are some other troubleshooting steps in here that might help.

https://appletoolbox.com/apple-pencil-not-working-heres-our-troubleshooting-guide/

If you haven’t updated to iOS 13.6 yet, that might also help if you update.

Start here:--> Use Apple Pencil with your iPad or iPad Pro - Apple Support

(in particular section: "If your Apple Pencil won't pair with your iPad").

Regards

Giulio