There is already a feature request in the HA community forum (https://community.home-assistant.io/t/thread-network-diagnostic-map/772778), but it seems stalled. With OpenThread v1.4 in the making, which will have improved diagnostic features, it would be also great to have the possibility to visualize the actual Thread network - with all mesh links including their quality - within HA.
If I understand it correctly, OpenThread’s Silk (https://github.com/openthread/silk) in combination with OpenThread Network Simulator (https://github.com/openthread/ot-ns) should already cover that ground.
So how about integrating Silk and OTNS into HA's "Matter Server" Add-on?