I have added solution selection to the Flow to Visio tool & added a few new actions.
If you have connected to Dataverse, there is now a new selection listing all the solutions in your environment.
The flow list is then restricted to those that are part of the solution file. Selecting the top left will select all that are part of that solution.
When you hit Create Visio, the default name is the name of the solution.
Finally, the Visio is created with each select flow in a new tab.
I created a short gif highlighting the change