As far as I know, the only new device model introduced by Roku in 2020 was the Roku Ultra 4800. The Streaming Stick+ 3810 from 2019 is still the current Streaming Stick+ model.
Roku Community Streaming Expert I am not a Roku employee, only a user like you. Please, no support questions via private message -- post them publicly to the Community where others may benefit as well. If this post solves your problem please help others find this answer by clicking " Accept as Solution.".
Streaming Stick 4K+ 3821 | Streaming Stick+ 3810 | TCL Roku TV 43S245/C107X