Those who know it from that definition might think this is a cold hearted diss, but it could be that Van Der Beek understood Cohen’s context in the question or he may just not know much more about the show beyond Season 2.
Given his statements in the past and the fact that Joey actually wore the wire to frame her dad and not Dawson, the latter wouldn’t be all that surprising.
While it seems Andy Cohen was using the term “jumped the shark” to mean Dawson’s Creek stretching the boundaries of realism, the official definition is when a show does something so outrageous that it becomes clear they’ve run out of ideas.