Mine says something like “do you have any income for the same condition…”.
I would be more concerned that they would think you can work if you’re capable enough to be a caregiver.
It sounds like they only want to know about your income for your condition from other insurance companies or legal action (car crash, workplace safety, etc.).
I am not a lawyer but I don’t think you need to disclose it.
Maybe @David_Brannen will respond.