Cash Gift Bonus

It comes in waves, from within the first 2 weeks after registering (1st bonus), to the last one at 18 months

https://www.babybonus.msf.gov.sg/wp-content/parent/documents/MSF_BabyBonus_Booklet_FA_Highres.pdf

I think you should get it between first 2-3 weeks

is it only for Singapore citizens?

Within first 2 weeks usually

Within first two weeks