Hi.

This happens because NVDA, by default and with both keyboard layouts, uses the Numpad for object navigation, screen review and review cursor functions.

To use the Home, Page up, End, Page Down and other key capabilities of the Numpad, please download the add-on on this page. Read the instructions before you do, so you will be able to configure the settings to your liking.

https://addons.nvda-project.org/addons/numpadNavMode.en.html

Cheers.
Andre