There is slight change in the initial release plan for FlexNet Manager Suite 2019 R2 - on-premises, We are aiming to release FlexNet Manager Suite 2019 R2 on-premises on 12th of November.
Added features and changes details for FlexNet Manager Suite 2019 R2 are available through helpnet.
https://helpnet.flexerasoftware.com/FlexNetManagerSuite2019R2/EN/features/index.html#FeatureList/2019R2/2019_r2.html