A family of System Center products that provide infrastructure monitoring, help ensure the predictable performance and availability of vital applications, and offer comprehensive monitoring for datacenters and cloud, both private and public.
Hi,
My recommendation would be to go over the resources below and then you will have a nice overview on what needs to be done and how it needs to be executed in order to have a successful migration.
Please go over those and you will have your answers:
How to upgrade to SCOM 2022 step-by-step
Coffee Break: SCOM 2022 Migration
SCOM Upgrades demystified by Bob Cornelissen
I hope this helps! Let me know if you have any other questions.