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Does the pattern have any directions for how to do the p2 into the yarn over? Sometimes these are at the beginning when the pattern sts are defined. If not, you could do a purl front and back into the yarn over and that will anchor both sts so that you can work into them on the next row.
Here are two videos for pfb. It's demonstrated into a stitch but you can do the same thing into the yo.
Ah, and I can see, no definitions of sts in the pattern: