Or more accurately, demand is down.
It's not exactly a good time to be building a performance PC, since graphics cards are largely out of stock and typically marked up by hundreds of dollars when you can find them. Plus, Intel is expected to be launching a new generation of processors soon that may offer a little more performance, so many of those looking to build a high-end system will be waiting to see what those have to offer. Both factors are undoubtedly reducing demand, as not as many people will be willing to pay a premium for them, and the sellers are undoubtedly finding it a lot harder to move units at marked up prices. Even the MSRPs for these parts were rather high compared to typical Ryzen pricing, with a total lack value-oriented models, so it's mostly going to be those wanting the absolute fastest who will consider them, and when something potentially faster is coming soon, they will be inclined to hold out for that.
As for supply, considering these chips are sharing the same 7nm process as AMD's GPUs and console APUs, I doubt production has actually increased significantly. Availability will probably improve at retailers the closer we get to the Rocket Lake launch though, and perhaps we will see some better-priced models not too long thereafter.