On 24 Feb 2023, the Government announced in Parliament that InvoiceNow (local brand for Peppol) will be the default channel for government vendors to invoice government in the next few years.
Please watch the announcement at the following link (it starts at 0:38s onwards):
https://www.youtube.com/watch?v=FVq61zxCkxw?t=38
Mr Geok Seong Wah, Director of E-Invoice Project Office said: “Our vision is the pervasive adoption and active usage of Peppol by all businesses in Singapore. The recent announcement is a testament of the Government’s commitment to continuously drive the adoption of Peppol in Singapore.