I saw weeks ago in the Novaspirit Tech channel video how we can change the Pi kernel to a 64-bit one, although it won't be much help in an operating system with 32-bit compiled applications and libraries, but it's a beginning.
The first thing to do is run the following:
And now we edit the file /boot/config.txt to add the following:
That's it. Restart and running uname -a we can see that the system is using a 64-bit kernel if it shows the text aarch64.