Anker claims this 40W 5 port (1x USB-C & 4x USB-A) wall charger has a USB-C port that does 3A at what I assume is 5V.
This would make it the first wall charger with more than 2 ports that can output that much power for USB-C.
That leaves 25W to be shared among the rest of the 4 ports averaging 6.25W per port.
Ideally I would prefer that each USB-A port have at least 10W each. Another thing I would want to see is that half the ports be USB-C at minimum 15W output each.