Hi @tychesoftwares,
Thank you for your reply! I double checked and “Enable Delivery Dates” field is enabled for all product categories. The issue is that the fields in checkout page to select date and time are available only for the main language. When I change to the secondary language the fields are hidden. Which is strange.
I already created a ticket and waiting for response. I just thought that information regarding this issue may help other people too.
Thank you!