Thanks for reaching out.
Could you try updating your Google App? Try reinstalling your Google Play services. Also, checking for system updates might help too. If the issue persists, you can contact our Pixel team for additional assistance. Let me know if you have questions for any Google Home or Google Nest devices, as I'll be locking this thread after 24 hours.
Thanks for your reply
Q checking for system updates
A: Today I updated the system
Q: Could you try updating your Google App?
A :The update is automatic,I don't know how to update,I also don't know which version I'm using
When I try to download GOOGLE ASSISTANT from Google Play
I receive a message that this item is not available in your country
Everything works fine except for this message
Thanks for the details. Since we have limited access with your phone's settings, it's best to coordinate with Pixel support. They are the best team that can assist your with it.
If you need help with any Google Home or Google Nest device, don't hesitate to create a new thread.