Red areas on our dog’s mouth (doesn’t look like puppy warts)

Got our 10 month back from boarding at his usual place. I noticed these spots on the base of both sides of his mouth look a bit red. Not exactly sure what it is but I don’t think it’s puppy warts. He had them a few months ago and looked different. Would have happened within a 4 day span. Any insight is appreciated I couldn’t find much with google search as I can’t seem to type out a description right.

Here’s some pics:

 
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