Some websites which offer classical Theravada resources such as Lectures, Sermons, Books, Zoom classes …etc in Sinhala Medium.
Mahaviharaya-
Affiliated to Diddeniya Forest Monastery of Sri Kalyani Yogasrama Samstha
Theravada Thripitaka Dharma Institute-
Affiliated to Kinitulagala Forest Monastery of Sri Kalyani Yogasrama Samstha
International Institute of Theravada-
of Sri Kalyani Yogasrama Samstha.
Youtube Channel