[5.x]: Backend - meta fields `postDate` and `expiryDate` not visible for entries without section.

[Megafry]

What happened?

Description

Multiple customers have asked us why the post and expiry dates cannot be set for entries inside matrix fields.
After looking at the code I found that this has been disabled.
Is there a reason why this is the case? Can this be changed?

Steps to reproduce

1. Open an entry in a new tab from a matrix field via the menu option Open in a new tab or go to admin/edit/45
2. In the sidebar, the post and expiry date fields are not visible.

Expected behavior

The fields should be visible.
In Craft CMS, all entries have a status, a start date, and an end date, therefore, the editor should have the option to set them.

Move this block of code out of the condition:
Code

If enabled, everything works as expected, my entry gets hidden in the frontend after expiration.

Actual behavior

The fields are not visible because of this condition:
code
if ($section && $section->type !== Section::TYPE_SINGLE) {}

Craft CMS version

5.7.4

PHP version

8.2

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions

[linear]

CMS-1484 [5.x]: Backend - meta fields `postDate` and `expiryDate` not visible for entries without section.