There might be several reasons why you’re noticing this discrepancy between Google Analytics 4 (GA4) and Universal Analytics (UA). This could be due to differences in how the two platforms process data or it could be due to user behavior such as opting out of tracking, blocking cookies, or using browsers that limit tracking capabilities. Moreover, GA4 and UA use different algorithms for sessio processing, so sessions might be grouping differently. Additionally, make sure that both GA4 and UA are correctly set up to track the same interactions, as misconfigurations can also lead to discrepancies. If none of these explanations seem to fit your case, then it might be wise to debug your setup to see if there might be any specific issues causing these discrepancies.