I wonder if that’s related to my issue.
I built a webpage last year on WordPress.com using Twenty Twenty Two. Today I checked it and suddenly the blocks that were 1000 px wide are now full page width and I cannot change that. Actually, in the WordPress.com editor they still show as 1000 px wide.
So I wonder if that could be related to the theme’s source code, not to the WordPress.com editor.
As a reference my webpage is lerneyo.com.