Gutenberg fullscreen mode + Admin Toolbar >= 3.3.1 + Gin hides the submit buttons

It seems that this is actually not that straightforward to do, because a lot of dialog/toolbar styling in the Gutenberg library has defined z-indexes that are lower and would be in conflict with such a change. It might be easier to just reverse patch the admin_toolbar module in that case.

How about just setting the z-index for the toolbar for fullscreen mode? Attached patch does this, it seems to work fine.

Thanks.

It seems to be obsolete today after the breaking changes have been reverted in the admin_toolbar module https://www.drupal.org/project/admin_toolbar/releases/3.4.0 →

Updating admin_toolbar to >= 3.4.0 fixes the issue, but then the toolbar is completely hidden. For those that want both the admin toolbar and the Gutenberg editor, one can include the following CSS in the admin theme (or include it as a module library):

.gutenberg__editor .interface-interface-skeleton {
    position: relative;
}