Most of Singapore land is on a 99-year lease. There is some freehold and 999-year leases left over from the British, but no new land will be created with that type of ownership.
When you buy land with a 99-year lease in Singapore, it will be turned over to the government at the expiration of the term, with $0 in compensation. There have been a lucky few who get en bloc development where the land is sold before expiration and a new 99-year is provided - so current residents get bought out at values higher than otherwise.
A few 60 year leases expired recently. The government assisted in finding new homes, but it was pretty much "get your belonging and leave".
https://www.channelnewsasia.com/singapore/lorong-3-geylang-e...