As far as I know, the Canvas/PS grade passback will only send numeric scores, not statuses.
In Canvas, you can set an assignment to display as complete/incomplete, which will display the checkmark or the "x" in the gradebook. This is an all or nothing score. When that assignment is sent to PowerSchool using the grade passback, it will send that numeric score - full credit or zero - and display accordingly.
In your Canvas assignments, you need to make sure there's a point value in the assignment settings or else it defaults to 0 when it is sent to PS.
Frankly, there is no incentive for Canvas and PS to make their grading systems more compatible. Powerschool has their own LMS competing with Instructure and the Canvas passback system is feeling more like a relic each year.
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