On the whole, South-east Asia's Internet economy is set to exceed US$300 billion in GMV by 2025, fuelled by e-commerce and online media consumption, said the report.
The nascent sectors of health technology (healthtech) and education technology (edtech) also played crucial roles in countries across the region, including Singapore.
The number of users on telemedicine platforms grew by four times, and these platforms retained users even after lockdowns ended.
Meanwhile, the number of students who installed the top five edtech apps in South-east Asia increased by more than three times.
Mr Rohit Sipahimalani, Temasek chief investment strategist and head of South-east Asia, said: "Both healthtech and edtech have allowed people to access critical services during lockdowns. For example, Singapore has always had digital learning platforms for schools, but this became really valuable during the pandemic as they allowed teachers to have customised interactions with their students."