According to the cpanel statement, cpanel will not support centos stream. Centos 8 will be supported, for this cloudlinux will issue a fork. The centos 8 support, which will officially end in 2021, will be extended to 2029. It has been announced that this will be in the first quarter of 2021. Also, even if you are currently using centos 8, you will still be able to switch to cloudlinux fork. But keep in mind that right now cpanel is in an experimental state for centos 8. After waiting a few months, you can make a new installation with centos 8 and continue.
If you don't want to wait, if you say that the situation of Centos 8 is confusing, today Centos 7 will be the best choice.