TPS7A7100: TPS7A7100 input capacitor

Part Number:TPS7A7100

1. I would like to use TI TPS7A7100 LDO, my question is regarding to the input capacitor, in the data sheet page 23 8.2.2.3 Input Capacitor Requirements it is recommended to use a capacitor of up to 1 μF (I'm planing to use 1 μF X7R ceramic capacitor at the input of the LDO), the problem is that the input voltage to the TPS7A7100 is sourced from DC/DC TI LMR33620ADDAR and his output capacitors are 2 x 68μF X6S ceramic capacitors (I have designed the LMR33620ADDAR with the WEBENCH tool), is there a problem in this case?
   
   
2. Can I add tantalum capacitor to the output in addition to the 22UF ceramic output capacitor?