Work through this list:

• Calendar colour - if the day is orange (In Progress) the date is closed; red (Finished) means it's already marked finished. Reopen it from the dashboard, or wait for the next date. Grey means the date is open but has no meals on this menu type yet.
• Wrong menu page - meals added on the Catering/POS/In Store pages do not appear in A la carte; the Meal Prep Menu feeds A la carte and Packs (and, typically, Subscriptions selections).
• Wrong kitchen - the menu belongs to the kitchen selected in the top bar; a customer served by another kitchen sees that kitchen's menu.
• Fulfilment weekday - the date must be on a ticked Meal Prep fulfilment weekday of the kitchen (and on the delivery method's days if those are restricted).
• Visible date range - Calendar Visible Date Range limits how many upcoming dates customers can pick; a date further out is not listed yet.
• Disabled recipes - inactive meals are not sold even when on the menu.
• Cut-off - once the cut-off has passed the date closes automatically.