@Yungzel,Thanks for posting in Q&A.
From your description, I know you want to disable cocreator in Microsoft paint via Intune or Group Policy.
Based on my researching, there is no related feature in Intune and there is no related setting in Group Policy. However, if you want users not to use cocreator in Microsoft paint, you can roll Microsoft paint back to version 11.2308.30, which does not have cocreator, and turn off apps auto update.
Here is a link about how to turn off app auto update.
https://www.thewindowsclub.com/disable-automatic-updates-for-windows-store-apps-in-windows-10
Non-official, just for reference.
And if you want Intune to implement this feature, you can submit your feedback to Intune. https://feedbackportal.microsoft.com/feedback/forum/ef1d6d38-fd1b-ec11-b6e7-0022481f8472
Thanks for kind understanding.
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