Before performing the procedure, you need to make sure that both the 1Control app and the commands app are updated to the latest available version
1) Open the Commands app
https://apps.apple.com/it/app/comandi/id915249334
2) Press the "+" symbol at the top right to create a new command
3) Press the "Add action" button displayed in the middle
4) Search in "Suggestions from your apps" or in "1Control" app
5) Rename the action in the indicated field
6) Try the command by pressing the Play symbol at the bottom right or by directly activating Siri
7) The voice command to use will be the one underlined in green in the image
above, must be said in full without waiting for Siri to open.