hope the beer was cold ..

I’d guess this was an expected win.

Put in the third string after you're 40 points ahead. And that 436 total yardage figure can't be right. It has to be a lot more that that when you score 91 points.

45 rushes between 10 backs.

No fumbles lost either side.

With no one player with over 11 carries.
I count 12 TDs, including both a punt & interception. Plus, 4 PATs & 3 FGs. And, 2 point conversions.
But, with 2 QBs & 10 guys running it, I'd say they cleared their bench.
By the way, Portland State was the same team that got beat by Oregon 81 to 7 on September 2nd. They've been on both sides in 3 weeks.
https://goviks.com/sports/football/stats/2023/north-american/boxscore/4830

Is it safe to say NAU did not come to play?

They accepted the game for the money & let their players get embarrassed.