It would appear that the Osmo Pocket wheel control and Holder are now available on the online shop.
Controller Wheel and Accessory Mount

Awesome, a good sign!

Interesting that some are showing "out of stock" and were previously listed as pre-order....able.  A good sign none the less.  I see that Adorama.com (US authorized DJI vendor) is now showing as "Expecting delivery from Manufacturer" where prior was pre-order status.

Hello and good day Ray-CubeAce. Thank you for giving us this information today. For additional reference I will be posting a link where you can find the available lists of DJI Osmo Pocket accessories. Thank you for your support and Happy Holidays.

https://store.dji.com/product-search?q=osmo+pocket

Not necessarily a good sign. The expansion kit was briefly available right after launch and it changed back to out of stock, too. DJI supply chain is the worst. Inexcusable in this day and age.

Thank you!!!