Hi,
Upgrade steps are:
SCSM R2 with Update Rollup 9 > SCSM 2016 -SCSM 2019 - SCSM2022
You can only upgrade to System Center 2016 from System Center 2012 R2 - Service Manager with Update Rollup 9 or later installed.
You can only upgrade to System Center 2019 from System Center 2016 or 1801 or 1807.
You can only upgrade to System Center 2022 from System Center 2019.
More information for you reference: