The Build-a-Bot has not been removed, but it's not always available in the game.
So if you don't have it right now, just keep an eye to see when it's back. Make also sure to update the app to be able to receive all new content and features.
Hi, welcome here @Wendy_Hall , Sorry about the rewards lay-off but sure it might be network or your game app isnβt accurately up to date ... just patiently crosscheck and sure you will see your rewards again .... Happy crushing π¬ and best of luck π₯