It's not possible -- and though you can bypass the unsupported CPU warning, the only way you can get to full Windows 11 compliance is with a new(er) system.  
I MAY BE SUGGESTED AS TO HOW I SHOULD REPLACE THE EXISTING PROCESSOR OF MY DELL VOSTRO15 - 3568 WHICH IS EQUIPPED WITH INTEL COREi37020u CPU TO ENABLE ME TOO UPGRADE MY LAPTOP TO WINDOWS11.
REPLACEMENT OF PROCESSOR OF DELL VOSTRO15 - 3568 TO UPGRADE TO WINDOWS11