Hi IT Centre Admin,
Thank you for reaching Microsoft Community. I'm sorry to hear about the issue with the pinch to zoom gesture on your Surface Pro 8. We'll work together to find out the what's causing this issue.
Does the issue only occurs in OneNote? How about in other Microsoft365 apps like Microsoft Word? or in any other apps on the device?
Is it only the pinch to zoom gesture that is not working properly? See: Touch gestures for Windows (microsoft.com) to try or test other touch gestures.
Lastly, I would like to ask if you installed a custom Windows 11 image on the device or it is still the pre-installed image?
For now, kindly try running these steps on your Surface Pro 8 then check if the issue persist:
1: Force Shutdown
Press and hold the Power button for 20 seconds
2: Run Surface Diagnostic Toolkit
See: Fix common Surface problems using the Surface Diagnostic Toolkit (microsoft.com)
3: Check for Windows Update
Go to Windows Settings > Update & Security and select Check for updates
Make sure all updates need are installed including Optional updates
4: Update drivers and firmware
Check what is the current OS Build of your Windows version by going to Settings > System > About.
Go to Download driver and firmware for Surface, choose Surface Pro
Then click the link next to Surface Pro 8 then click Download on the next page.
Choose the .msi file that matches your current OS Build and click Next.
After downloading, run and install the .msi then Restart.
5: Update apps through the Microsoft Store
See: Get updates for apps and games in Microsoft Store
6: Run System File Checker Tool