You can view the audit log reports from a site collection settings.
To view an audit log report:
Click Settings, then click Site settings.
Click Audit log reports in the Site Collection Administration section.
Select the report that you want, such as Deletion on the View Auditing Reports page, .
Type a URL or Browse to the library where you want to save the report and then click OK.
On the Operation Completed Successfully page, click click here to view this report.
Documentation: View audit log reports
If you are not able to use above steps, you can get the audit logs in the compliance center.
Check below documentation for more information: Search the audit log in the compliance center