The Google Store listings for the 2nd Gen Moto 360 are gone after having been out of stock and no longer for sale for a little while now. This was to be expected as Google has been cleaning house as of late and have removed other devices that are no longer for sale, such as the Huawei Watch which was just removed from the Google Store at the tail end of last year. With this in mind, it was only a matter of time before the same fate befell the Moto 360 2nd Gen.
Prior to now, the listing pages for both the Moto 360 2nd Gen and the Moto 360 2nd Gen in Rose Gold were still showing on the Google Store alongside all the other Android Wear smartwatches, but they were labeled as out of stock. Now, the only watches that are still visible in this section of the store are all of the watches that you can actually buy, which includes the Nixon Mission, the Michael Kors Access Bradshaw and Dylan, and the Polar M600. You can also find the MODE watch bands at the very bottom of the list as well if you enjoy the colorful nature that they showcase, with both leather and silicone options still being available for purchase.
Not too long ago Google also removed all of the Fossil Android Wear smartwatch offerings that used to be listed on the same page, so Google really has been looking to clean things up and it should make sense as there's no reason for keeping a listing for devices that aren't available. Customers who are still interested in the Moto 360 2nd Gen in either configuration can still pick up the watches from places like Amazon and eBay, so they haven't completely disappeared, but you can no longer officially get them from the Motorola website either, so any place that they will be found is going to be through a third-party reseller or merchant website. If that doesn't bother you, you should also be able to find them in both new and used options and at a little bit of a discount.