Does this game even do server maintenance?

Yes, servers do go through maintenance, both lobby and match machines. Just a couple of days ago, 9 of the datacenters from the list were down. Also, the ones I use often, Frankfurt (1-2), goes to the bottom on  a weekly basis, while their average ping keeps changing from 30-40ms to 60, which might indicate that different machines are allocated on regular basis. As for the match servers, we will never see them down, because that's the point of hybrid cloud. Where other games stop us from playing, due to server maintenance / load / etc., Apex just connects us to machines from the public cloud or to servers from other data centers.

If Apex would've had only dedicated servers then we probably would've seen some serious downtimes, consider by how much the game scales during peak times. We are talking days for each new big update.