We bought Customer Voice, because we have the need to add a session id as a URL parameter and access it from PowerAutomate as described in this tutorial https://meganvwalker.com/passing-variables-through-the-forms-pro-survey-url/ which worked in Forms Pro.
The TLDR; is you use the CDS trigger in PowerAutomate, read out the Context Data which will contain the params passed as URL params in ctx.
Should this still be possible in Customer Voice or was this feature dropped? When I'm testing I don't even get the attribute Context Data.