Looking for the QoS graphical data after UIM 20.3.3 migration.
Release : 20.3
Component : OC reporting
Please check this QoS data View and Export Techdocs.
You can create Metrics monitoring view.
You can also create MCS profiles with your required QoS Metrics to monitor.
You can create Reports.
Also check the SLA report creation.
For your reference, adding some helpful KBs on reporting: