I guess it might be a good time to take advantage of no cancellation fees in the low chance that they withdraw it in the coming monthsSingapore Airlines publishes lists of cancelled flights and altered schedules, here's their one for April: Covid-19: Singapore Airlines and SilkAir Flight Schedules for April 2020, others will be published for coming months... so keep an eye out.
I wouldn't assume this as they don't know whether or not you have the right to transit/enter Singapore (for example a returning citizen).