Hello @MPROCD,
I had issues with a fresh install of Android mode and the latest SDK.
I installed Processing 4.5.3 and used an older SDK and it worked!
Older SDK had this:
Latest SDK download had this:
I had to modify the preferences.txt manually to add the SDK location:
There were issues trying to add it with the new preferences UI (User Interface) so I abandoned that approach.
At first glance it seems that the new SDK is missing the required base platforms/android-33 package and only contains platforms/android-33-ext*.
I rarely use Android mode and this is what I can share from a quick exploration.
:)