I've went with the over but winning 6 playoffs games is actually really hard and I wouldn't be surprised if he doesn't get there. You need a lot to go your way, not just have great QB play but you need to have years where the team isn't injured, the defence doesn't suck etc. It's actually a pretty high bar to cross.
Just like this boards man crush Josh Allen is 5-5 in 5 playoff appearances, while having a top 5 rated defence every year. Same with Lamar, he's 2-4 in 4 tries and he had everything right this season, #1 defence, home field advantage and a mostly healthy roster yet still only managed to win 1 game.
I just believe the Dolphins are on the right track and have a coach that understands the modern NFL of needing a very efficient passing game to have any chance at all. The future is bright for the Dolphins even if some don't see it yet.