Hi,
Per my searching, the registry key used to be working in windows 7 but failed in Windows 10.
Moreover, the option of disable pinch zoom under additional mouse settings/device settings won't show up in all laptop or touchpad. Instead, Users shall check what kind of touchpad driver or application has been applied in their computers and modify in the specific Touchpad Setting Program.
Reference links:
Disable Pinch Zoom Feature in Windows 10
https://troubleshooter.xyz/wiki/disable-pinch-zoom-feature-in-windows-10/
Disable Pinch Zoom on Laptop -Device Setting tab not available so cannot disable
https://h30434.www3.hp.com/t5/Notebook-Video-Display-and-Touch/Disable-Pinch-Zoom-on-Laptop-Device-Setting-tab-not/td-p/7106383
Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.
Hope this helps and please help to accept as Answer if the response is useful.
Thanks,
Jenny