What should be the lunch target to build AOSP 13 code for tablet emulator
I can launch phone emulator using lunch target sdk_phone_x86_64-userdebg.
But I want to build AOSP for tablet emulator
I think it's the same image, but different skin. That is, the tablet layout is determined by the size of the screen, not by a dedicated image.
Therefore I would try:
avdmanager ... -skin 1080x1920 ...
if the existing skins don't meet your requirements, you can create a new one, following the format here