Data source patches in 7.3.1+ can extend the schema.
Looking at your OCI ASUP data, it looks like you are running cDOT datasource code as it shipped with 7.3.1
It could be that 7.3.1 didn't ship out of the box with compaction support within cDOT.
It may also be, that the DWH dynamically creates that table as necessary, and perhaps you have no datasources deployed that extend the schema.
We are unfortunately behind, and haven't been able to ship a data source service pack for 7.3.1 yet, as had been expected.
Installing the latest cDOT patch may sort this out - on my laptop, compaction is additionally visible as part of the capacity as a time series feature
Matt