As per the documentation, no hardware/software information is migrated by the migration tool.
You will need to deploy the agents from the 20.19 version to gather fresh data.
Track-It! 2019 and Track-it! 11.x editions use different technologies when it comes to asset discovery and audit. This also means the software & hardware information captured and preserved by Track-It! 2019 vs Track-It! 11.x differs...
This is one key reason why during migration asset data that is captured through audit is not migrated to Track-It! 2019
Refer to below documentation details:
And here is the highlighted section that explains what happens and recommendations