I don’t think the breakfast call is necessary, it’s enough to tell guests when the buffet opens and let them decide if they’ll go for it or not. Alternatively, allow guests to make wake call request
Traveloka Sdn Bhd (No. Pendaftaran 201501003122), Tingkat 14 Menara 2, Menara Kembar Bank Rakyat, 33 Jalan Rakyat Brickfields, 50470 Kuala Lumpur, Malaysia