Help Key Command for truplets

Hello friends!
I have a problem with assigned Key command at the truplets in the left box.

In preferences>Key commands I can’t find the command to assign a keyboard shortcut. the only command that looks like it is the one related to the popover of irregular groups… but that’s not what I’m looking for.

Please, can you help me?

There is no way of defining a shortcut for a regular 3:2 tuplet from within Dorico. If you’re happy to edit your keycommands JSON file then you can add a shortcut as Paul explained here:
The definition will need to be 3:2, not 4:3, obviously)

Thank you very much Pianoleo…
You’re a very great resorce!