Hi!
recently, I developed a small plugin for QGIS to connect it with VROOM: GitHub - Suddber/vroom_for_qgis: Processing Plugin for QGIS to interact with VROOM
I also made it it possible to access the ORS optimization API. Using this plugin you have a few more options for the optimization API than ORS Tools. It is my first QGIS plugin and my first GitHub repository, so there are probably a lot of bugs, but feel free to test it.