Probably you are here because you have tried different approaches in order to activate windows copilot, but failed. Right? Okay, so here's what I found. For some regions, like the EU, it hasn't still rolled out for everyone, but yet I found a solution to get it activated.
- Always be up to date.
 - Head to settings -> Windows Update -> Windows Insider Program, there:
 
- If you are already in the insider program, make sure you are on the "Release Preview"
 - If you are NOT in the insider program, join it and select "Release Preview" (Initially set for Dev Channel)
 
- Go to Time & Language and set your Region to the United States.
 - Finally, you need to modify the registry in order to bypass the checks.
 
- You can either go yourself to  
"Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Copilot\BingChat"and setIsUserEligiblevalue to 1, or run the_enable.copilot.batscript I provided. 
- Lastly, go to Settins -> Personalization -> Taskbar and you should see it. Let me know if it doesn't.
 
For some reasons, I noticed that after rebooting the system, the IsUserEligible is set back to 0, causing the Copilot to disable. To do this you can make the script run on startup.
If I helped you, don't forget to star this repo, for others to see it as well.