Hello again,
Correct, the max capable current is going to be 3A. However at 12Vout at the bus, the max current caps at 1.5A where 3A maxes out at a 5Vout bus voltage.
However I can understand the question given the maximum limits on the recommended settings:
I believe 12V @ 3A should be possible here but I will double check with the PLs here and get back to you here. I have a feeling there is also a dependency on the higher input voltage.
As for that resistor in accordance to the PCB Layout Guidelines, you should be ok.
Best,
Krishan