OfficialRules said:

Question: When playing the command card Covering Fire, if an attacking corps unit forms multiple attack pools, does another unit gain a dodge token each time an attack pool is resolved?

Answer: No. An attacker is only ever considered to have performed one attack for the purposes of game effects, even if multiple dice pools are resolved. Game effects that trigger during an attack apply to each attack pool. However, any effects that trigger after a unit has performed an attack apply after all attack pools have been resolved, and the unit is considered to have performed only one attack or attack action.

OfficialRules said:

Question: When playing the command card Pinned Down, if an attacking heavy or support unit has more than one mini or the Arsenal keyword and attacks more than one enemy unit, if each defender has a face-up order token, are all face-up order tokens returned to their order pools? Or does this effect only allow one order token to be returned?

Answer: Each defender’s face-up order token is returned. While an attacker is only ever considered to have performed one attack for the purpose of game effects that trigger after an attack, the text “a unit with a face-up order token” is not meant to restrict the effect to one unit.