Install MySQL 5.6 on Ubuntu 20.04

I have a custom app that required MySql 5.6. I was able to install MySql 5.7 on ubuntu 20.04 using this tutorial: https://askubuntu.com/a/1232993

How can I install MySql 5.6 on ubuntu 20.04?

Because the above tutorial only works for MySql 5.7, and I didn't find any working solution online.

Can MySql 5.6 run on Ubuntu 20.04? Should I downgrade the OS to Ubuntu 18.04?