For investments via Groww Autopay: 
Expected fund realization: T day
Expected NAV date: T day
Expected Unit Allocation date: T+2 day

For investments via BSE Mandates (Biller/One-time madates): 
Expected fund realization: T+2/3 day
Expected NAV date: T+2/3 day
Expected Unit Allocation date: T+5/6 day

T day is the transaction/due date for your SIP installment