Didn’t they predominantly play three centre backs at the back?
No pretty sure they didn't. Tuiloma had a run of starts at RB, when Charlotte had some injuries. Then he got his own hammy injury, and when fit couldn't break back into the run on side.
https://us.soccerway.com/game/charlotte-fc-QJF7WTFB/fc-cincinnati-8btog05R/summary/lineups/?mid=G6PwluQ8
Boxy's Minny & Surman's Portland yes both often played with a back 3/5, especially Minny.