Hi Mdm Wang,
Yes, Singaporeans may purchase properties in Malaysia. However, do note that there are property ownership limits (minimum purchase price), which differs from state to state in Malaysia. So, if a foreigner is looking to buy a property in Selangor, the rules are different from buying a property in Penang.
We've a comprehensive guide detailing the types of properties foreigners can buy, ownership price limits in each state, the steps involved and more. It's here: https://www.propertyguru.com.my/property-guides/complete-guide-to-foreigners-buying-property-in-malaysia-30975
Hope this helps!