Hi there, Multiple Choice question types set to 'Allow multiple answers' should work with In-page Display Logic. Your set up should look pretty similar to the example offered on this page:
https://www.qualtrics.com/support/survey-platform/survey-module/question-options/display-logic/#UsingInPageDisplayLogic

Tom_1842 thanks for your answer.
Unfortunately though, Qualtrics does not allow to apply in-page logic with a multi select box. Check out the screenshot with the error message at the bottom.
I think I need code :(
Thanks

Sorry, I misinterpreted "Multi Select Box" to just mean a Multiple Choice question with "Allow multiple answers" enabled, but I see now that the Format in your case is "Select Box" and not "List".
On my end, though the Qualtrics UI doesn't like it, I was able to get this to work without code by first configuring the In-page display logic while the question is in "List" format, and then changing it to be "Select Box". I get the message that the display logic may behave unexpectedly, but it seems to be working in my Previews.