In the admin sidebar open the Meal Prep section and click Meal Prep Menu. The URL is /admin/menus, and the page always works on the kitchen location currently selected in the top bar - the kitchen name is shown in the page header eyebrow.

If you open /admin/menus without a date, Sprwt automatically redirects you to the next open delivery date for that kitchen (the URL gains ?dd=YYYY-MM-DD). The other channels are reachable from their own sidebar sections: Catering Menu (Catering section), POS Menu (POS section), Real Time Menu (Real Time section), In Store Menu, Retail Menu and Wholesale Menu (all under the Retail section). Note that Preset Menus and your meal recipes live in a separate Kitchen section, not inside Meal Prep.