Can you check please the screenshots:
https://prnt.sc/l6acmqMwfDks
https://prnt.sc/_37qHtocdXlC
Is it what you are trying to complete? On the above screenshots:
1st element will be shown if [123] will contain “bad” in value, for example: bad, good, very good, if the checkboxes will be good, very good – it will not be shown.
2nd element will be shown if [123] will contain “good” in value, for example: bad, good, very good
P.S. In your case, it could be needed to use “separate” values and the shortcode as [123 show=”value”]
If it’s still not what you are looking for or it’s not working as expected, create please “textarea” and map it with shortcode as [123] and [123 show=”value”]. Attach the output of the “textarea”.
[123] must be changed to your “checkbox” Field ID.
P.S. You can also check Formidable Forms inline conditional logic for the checkbox: https://formidableforms.com/knowledgebase/conditionals/#kb-show-content-if-a-field-includes-a-value