Possible reasons for the discrepancy:

1. Returning Users: Many downloads could be from users who previously purchased the app and are simply reinstalling it. Check the user acquisition reports in Google Play Console to differentiate between new and returning users.

2. Google Ads Attribution: Ensure conversion tracking for purchases is correctly set up in your Google Ads campaign. Ad clicks might not always result in purchases.

3. Refunds or Cancellations: Check the Order Management section in Google Play Console for refunded or canceled transactions.

4. Technical Issues: Test the purchase flow in your app to ensure it’s functioning correctly. Use logs to identify potential errors.

5. Delayed Reporting: Purchases may take time to appear, depending on payment methods or regional delays.

6. Fraudulent Installs: Investigate unusual install patterns. Some downloads might not represent genuine user activity.

Action Steps:

• Analyze Google Play Console's acquisition reports and user demographics.
• Cross-check Google Ads conversion tracking.
• Test the purchase flow using a test account.
• Contact Google Play Console support if discrepancies persist.