People tend to forget LSU won a NC in 2007 with two conferences loses to UK and Arky. But they won the SECC.
That year was odd. There were zero P5 undefeated teams & only two P5 teams had 1 loss (Ohio St and Kansas). If we had a playoff that year it would have been OSU and 3 teams with 2 losses.
This year is completely different. Without upsets other than LSU beating UGA, a 2 loss LSU would be trying to get a spot over 7 undefeated or 1 loss P5 schools.
The committee already set a precedent picking a 1 loss Ohio State over a 2 loss Big 10 champ Penn St that beat Ohio St.
I don’t think LSU gets in the playoff without some help even if they win out & win the SECC game.