A: Yes they sure can.
The specs on the four analog outputs marked Monitor 1 and Monitor 2 on the rear panel of AX Center are identical to the output on the Analog Out expansion card – it’s the exact same pristine D/A converters.
This means that you can feed a 7.1.4 Dolby Atmos speaker setup by adding a single Analog Out expansion card to AX Center, which adds up to 12 analog output channels in addition to the two Headphones outputs on the front panel.
Therefore, you will still have one expansion slot available that you can use for e.g. Analog Inputs, AES or even more Dante or MADI channels.