Why have the Tickets of Guidance not been added to the Cave of Space-Time Shop despite Main Quest 19-20 being cleared?

After clearing Main Quest 19-20, new products will be added to the Cave of Space-Time Shop when it refreshes.

The Cave of Space-Time Shop can be refreshed via the two methods below:

• The Cave of Space-Time Shop will automatically refresh every day at 4:00 (Server Time)
• The Cave of Space-Time Shop can be manually refreshed by spending Diamonds