When we say something is wajib, does that mean an individual is considered to be sinning when he/she doesn’t practice that wajibaat? What are the Wajibaat in Islam?
Yes, not doing something wajib is a sin. You can see some wajeb acts here: https://www.al-islam.org/greater-sins-volume-3-sayyid-abdul-husayn-dastghaib-shirazi/thirty-ninth-greater-sin-neglect-any