just the ability to see the towny plugins towns and nations similar to this project (https://github.com/TownyAdvanced/Dynmap-Towny)

it would be wonderful if this is easily possible as we would love to use bluemap on our server instead of dymap

BlueMap does not add native support for other plugins, it provides an API on which other plugins can extend on.

There is https://plugins.mcgsoft.eu/mcg-bluemap-essentials/
and https://github.com/Hafixion/TownyBlue
Both claim to add support for Towny :)