Though the Columns block does not have full-width style variants, they can be added by simply grouping the block since the Group block has the full-width style variants.
Full Width Page
Duo Reges: constructio interrete. Res enim concurrent contrariae. Sed tamen intellego quid velit. Illi enim inter se dissentiunt. Duo Reges: constructio interrete. Res enim concurrent contrariae. Sed tamen intellego quid velit. Illi enim inter se dissentiunt.
