Singapore government warned about this a few years ago:
https://www.ica.gov.sg/news-and-publications/newsroom/media-release/public-advisory-on-fake-sg-arrival-card-website
However since that time, many other fake sites have been launched not only for Singapore but other popular tourist countries like Australia, Thailand, Canada, US, and others... many of these phishing sites have better SEO than these governments do, so they can outrank and trick people easily