I’ve always known the Hermès models to sometimes be in stock at Apple flagship locations and some touristy areas (Vegas, Miami, etc.), otherwise you’d have to order it or go to Hermès.
But I’ve also noticed the Hermès watches are mostly only available in these specific Apple stores right after a new model launch or band refreshes. Once they sell out from the stores, ordering one becomes mostly your only option (every now and then, I’ve seen them pop up in the flagship stores but I believe it’s only a couple of units at a time).
Since were coming up on the Spring band refresh, I believe this is why we’re not seeing any Hermès units available in Apple stores right now. Everything above is just my opinion, someone else with inside information can feel free to correct me.