The Campaign Client Console requirements have been updated in the Compatibility Matrix as per the latest Adobe Campaign Classic build, which is, Build 9282 released in Release 21.1.2 on April 15, 2021. Please check the Compatibility Matrix documentation for the updates and changes.
In case you have any questions, please feel free to post them below or reach out through the community Q and A section.
In case you have any ideas and/or suggestions regarding the Campaign Classic product, then kindly submit them here.
Sukrity Wadhwa