I don’t think Amazon was penned for the initial batch of encode plus locks - on the day it was officially announced for launch in the US, I refreshed Amazon US like mad and like you managed to catch the product page go up but immediately show as out of stock.

I too got placed on a waiting list but right now you can’t even find the page without a direct link: Schlage BE499WB CEN 622 Encode Plus WiFi Deadbolt Smart Lock with Apple Home Key, Keyless Entry Door Lock with Century Trim, Matte Black https://www.amazon.com/dp/B09RS6C1SJ/ref=cm_sw_r_cp_api_i_P0YTTAV8EMWA6ZKDRGWP?_encoding=UTF8&psc=1

Hopefully not too long for either of us!