Anyone has whatsapp or telegram group chat for father?

Aww so sweet that you are looking for a daddies support group, not many papas so proactive one lah, your child is very lucky! Honestly I don't have any specific daddy group links to share right now but maybe you can try searching on Facebook Groups for "Singapore Dads" or "Singapore Fathers Group" because got quite a few active communities there. You can also try posting on Reddit Singapore parenting thread or ask in the SAF Dads or community centres near your area because some CCs actually organise daddy and toddler activities which is a great way to meet other dads in a similar stage as you!