Absolute return is total profit on total inflow. It hides every detail about when the money arrived. XIRR is the rate that respects timing. If your app only shows absolute, dig deeper or paste the cash flows into a sheet.
The 5Y CAGR on a fund factsheet assumes a lump sum sat for five years. Your SIP CAGR is XIRR. They will diverge by 200 to 400 basis points in any normal market. The brochure number was never your experience.
A two year SIP that catches a steep rally looks heroic on absolute and ordinary on XIRR. Long SIPs in fairly normal markets see the two numbers converge. If the gap is huge, time did most of the work, not the fund.