Page options working only for network administrator

Single site admin vs network admin shouldn't matter - those metaboxes only show for users who have the activate_plugins capability.

You can alter this by adding your own filter:

add_filter( 'generate_metabox_capability','generate_custom_metabox_capability' );
function generate_custom_metabox_capability()
{
      return 'activate_plugins';
}

Here's a list of capabilities: https://codex.wordpress.org/Roles_and_Capabilities

You'll see "activate_plugins" as the first one under "Administrator".

Are you sure you have those two metaboxes selected under "Screen Options"?

Ok,my issue resides here:

I'll have to learn to be less paranoid and let my site admins to activate/deactivate plugins.

Thanks Tom.

You can always change it to whatever capability you like - that's the beauty of filters :)

Is it possible to add this filter as a mu-plugin?
This way i don't need to create a child theme just for this.

Thanks in advance

Ok, I've just created the plug-in... it was ridiculously simple.

Thanks

Awesome :)

For others, this plugin makes creating plugins super simple: https://wordpress.org/plugins/pluginception/

This is not working anymore :-(
Sections and Disable elements are working as expected but not for Footer Widgets or Sidebar Layout

Ok, fixed it. My fault.

add_filter( 'generate_metabox_capability','generate_custom_metabox_capability' );

function generate_custom_metabox_capability()
{
      return 'delete_pages';
}

Glad you got this figured out! :)