Hello,
1) WooCommerce displays products from the parent category Υπνοδωμάτιο, not from the subcategories. Both products were added to Υπνοδωμάτιο category.
2) What toggle do you mean? There is no any additional toggle to show all the Dashboard items https://prnt.sc/1yfn8ex Anyway, it’s not necessary anymore.
Regards