Observed after upgrading to UIM 20.4 CU4, the performance data will not go beyond 3 months as per raw retention data i.e. 90 days.
PRD displays data as per data_engine raw data retention setting only and not using historical data setting.
Release : DX UIM 20.4 CU4/CU5
Engineering has fixed similar issue for the metric viewer and fix is already available in DX UIM 20.4 CU5
PRD issue fix will be available in DX UIM 20.4 CU6 which is tentatively planned for release at February, 15 - 2023.