Roadmap for TVM network devices?

I see that agent based scanning for network devices is being deprecated for Defender TVM in November this year. It's not clear what the replacement solution to this will be - while the product support is not exhaustive, for perimeter devices getting TVM information as part of the Defender for Cloud for Servers license is a valuable addition.

Is there any roadmap information, or documentation that outlines how we'll be able to achieve the same outcome of TVM information for network devices for weaknesses and threats? 

I've been looking but cannot find a clear direction on this or whether I'll need to start looking at 3rd party for TVM on network devices.