Regarding the spouse with a lower income and the spousal IRA

I see this on the internet about the spousal IRA:

 

"Only the spouse with the lower compensation is eligible to use the other spouse's compensation to support their IRA contribution"


Does this mean "lower" as in zero earned income? Or is it also for a spouse who made minimal compensation?

 

For example, what if my wife is employed with an on-call job and made $200 (W2 wages) in 2022? Does she still qualify for the spousal IRA (assuming I qualify with all the other stipulations)? Or does she need to be NOT BE EMPLOYED?