Automated process Data Studio
This is currently not supported.
There is no API to programmatically copy reports or reconnect data sources.
Is it possible to create an automated process where a script (could be Python) could grab a Data Studio template, replicate it and then connect to a different data source?
My concern about using 1 dashboard for all 300 clients is the load time to filter and update the dashboard, plus restricting access to the client to only see their data.