Now that you’ve mastered the brkfyof, let’s expand that increase to really grow your stitch count even more. The brkfyofyof is a 4 stitch increase. Brioche knit into the front, yarn over, front, yarn over, and front (brkfyofyof) is a central (non-leaning) increase method. Going from 1 brioche st to 5, this increase is worked over 2 passes (1 brioche row). The first pass (with your MC yarn) creates the new stitches. The second pass (with your CC yarn) gets those stitches into brioche format.
