"show_empty" does not work in Layout Builder

I tried to replicate the issue but it didn't reproduce.
Drupal version: 10.2.7
office_hours module version: 1.17.0

In order to replicate, all the hours must empty on the entity.

Without Layout Builder.

With Layout Builder

This should not be possible. I guess all other settings are not used then, too. Please check that.
Please check if the correct ViewMode is used.
IN the code, you can see several references to layout_builder please grep them and test the behaviour.

I can confirm that I am using the correct view mode. After further investigation, this appears to be happening with any field in Layout Builder. In Drupal\layout_builder\Plugin\Block\FieldBlock::blockAccess, the selected field's isEmpty() method is checked, and if true, access to the block is forbidden. There appears to be an issue for the Drupal project to try to add a setting to allow the field to display, even if empty. It would be nice OfficeHoursItemList::isEmpty() returned false if show_empty is checked, but I can understand how that would be messy to implement.

1. Drupal\layout_builder\Plugin\Block\FieldBlock::blockAccess
2. 🐛 Formatters for empty fields do not render with layout builder enabled Needs work

I tried to move the 'show_empty' into $items->isEmpty(), but the formatter settings are lost in the ItemList.
I does not seem right to override the layout_builder code, even if it core.
Also, it seems as I have a higher Drupal version then you, since in my 10.2.x system, #3119786: Default values are not displayed for image fields placed in Layout Builder → is committed, removing the line you mention.
Perhaps the problem is solved in a higher Drupal version?