Xp-amp-app-usage-dnu

{"timestamp":"2022-06-03 00:28:45.00 +0300","bug_type":"225","os_version":"iPhone OS 15.5 (19F77)","incident_id":"9AA906E2-81CD-4000-A518-C8F6BBCF3202"}

[{"osVersion":"15.5","rangeEndTime":1654205324,"eventType":"installs","eventVersion":1,"itemId":"1108187098","topic":"xp_amp_app_usage_dnu","bundleId":"com.apple.mobilemail","shortAppVersion":"1.0.0","installType":"prior","appPlatform":"iOS","count":1,"appVersion":"1.0","baseVersion":1,"bundleVersion":"3696.100.31.2.1","eventTime":1654205324035,"clientEventId":"2276D1F0-A1A4-4DE7-B33B-E89059974302","usageClientId":"350AA4F1-CDA4-4E13-BB28-5134E69690B8","timezoneOffset":-180,"app":"com.apple.appstored","rangeStartTime":1654177200 and more….please what is this?