I am not sure if something changed in Gutenberg because I don't remember noticing this issue in previous testing. Regardless, there is no left/right padding on single pattern pages (example).
Tablet size
Mobile size
It should look like this:
Tablet size
Mobile size
Possible Solution
I think if you change the width of the two container blocks from alignfull to alignwide, the issue should be solved.
I am not sure if something changed in Gutenberg because I don't remember noticing this issue in previous testing. Regardless, there is no left/right padding on single pattern pages (example).
It should look like this:
Possible Solution
I think if you change the width of the two container blocks from
alignfulltoalignwide, the issue should be solved.