Fyi, the changi website updated the transit info
https://www.changiairport.com/en/air...h-airport.html
"special holding zone" for transit passengers only needed for countries on restricted category. No countries are listed on this category starting 22Feb
Latest update: All connecting passengers, except for those from countries/regions in the Restricted Category as classified by Singapore's Ministry of Health, will not need to remain within the Transit Holding Area from 2359 hours on 21 February 2022 (Singapore Time). There are no countries/regions currently in the Restricted Category. Click here for latest information.