When we compare the data coming from Adobe Analytics API and Analytics Dashboard, we see a discrepancy of around 1-2% in the metric values for a few dimensions for any given date range selected. We compared a few dates from October 2021 and checked with the dashboard, and we see a discrepancy. Let me know if there is any specific reason for this.
I will recommend checking data feeds to validate if all the hits sent to Analytics are being received. You should also check if any of the hits were excluded.