@Y.N , Thanks for posting in our Q&A.
In fact, to add work profile, we need to ensure Android Enterprise is available in your country or region and the device is under Android Enterprise supported list. This is not controlled by Intune, but Google. Based on my check on their official article, I find the "Google Pixel 3" is under the supported list but "Google Pixel 7 pro" is not. Here is a link to check the supported devices for your reference:
https://androidenterprisepartners.withgoogle.com/devices#!?search=google%20pixel'%207
Note: Non-Microsoft link, just for your reference.
I think this is the reason that you can't add the work profile on "Google Pixel 7 pro". You can contact their support to see if ‘Google Pixel 7 pro" can be added into the supported list in the future.
Thanks for your understanding.
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