In reply to Justin Tadlock.

Great, thank you! Your explanation helped alot..

One of the reasons I was very confused is frostwp did not have support for nested blocks width alignment, so I did not have option for 'wide' or 'full' I switched to a Automattic block theme and the options were then available for nested blocks.

I think those block settings maybe can be improved with the wording or explanation as well. Even the helper text wording is a bit odd 'Customize the width for all elements that are assigned to the center or wide columns.'