Navi 21 also known as Big Navi has the GFX ID of 1030. One ID above sits Navi 22, which at this point is easy to guess it will succeed Navi 12. In case you missed the story, this chip is a custom GPU for Apple MacBook. The Navi 22 is likely to follow suit for next-gen MacBook. When it comes to Navi 23, we are not sure yet where this processor will fit, but one would guess it will replace Navi 14. That said, it is likely an entry-level product.
So the full line up is confirmed— _rogame (@_rogame) June 19, 2020