I've had Affinity Designer since it was first available on Mac, and I've watched people request a bitmap trace feature for literal years. It is astonishing and disappointing to see such a fundamental tool for vector illustration, and it's bigger feature that will only keep Designer from surpassing its rival Adobe Illustrator.
If you are looking to trace bitmaps, go check out Inkscape. Provided you can get it to actually install and work (I've had little success) it can trace bitmaps very well as a free and open source vector program.