Voice specific dynamics and piano

For piano, and for example in this bar, I’d like to have a specific dynamic for the whole bass clef, and a distinct dynamic for the voice in the treble clef.

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I know how to use voice specific dynamics, but is it possible to have one dynamic cover two voices, without having to have two separate dynamics?

Is the answer going to be to have two and hide one intensity marking?

Would a comprehensive dynamic cover the bass clef, combined with an ALT/OPT dynamic override for the top staff voice, cover what you ask for here?

As you said, you understand how to assign dynamics to voices.
Perhaps I do not completely understand what you are asking.

I think so , yes.

Now I did not know voice specific dynmiacs override the general dynamics. If that’s really the case that is a prefect solution.