In Galaxy Trucker, there is a “distance” or “race” track that manages turn order.
Once all players have built a space ship (simultaneously picking and laying tiles), players place markers on a race track. The first player to finish building their ship is in first, the second player behind them, and so on. I believe there is one empty space between them all as well.
The rest of the game is flipping over event cards one by one and resolving them. Some events are resolved by all players simultaneously. Others are resolved in the order on the race track. First player resolves part of the event. If there’s anything left to resolve, second player resolves part, and so on.
Part of resolving an event might involve moving a certain number of steps up or down the race track, skipping over any occupied spaces.
So turn order here would be complicated to work out, especially in a FSM. Effect cards may change turn order, but not always. There may be empty space between two players in the turn order that gets reduced or increased instead. I suppose you could model it with N real players and then X place-holder players that don’t actually take their turn.