Swen Vincke has confirmed in recent interviews that rolling for stats will not be available on release.
Does that mean it will be implemented someday?
It will be a mod, in fact there are already mods that do this for the EA version. It may take a minute for them to get it re-built for the full game though.
If you have questions about it you should check out the Mod community on the Larian Discord. They are really helpful and friendly.
https://discord.gg/larianstudios
