Several? I can see one (the one you cite). Some of the other variants—e.g., no castling at all, or pawns can’t move two squares on their first move—can lead to positions that also arise in normal chess. But having neither side castle at all is really unusual and most such positions will be well out of distribution; and it’s very common for some pawns to remain on the second rank all the way to the endgame, where the option of moving one or two squares can have important timing implications.
Several? I can see one (the one you cite). Some of the other variants—e.g., no castling at all, or pawns can’t move two squares on their first move—can lead to positions that also arise in normal chess. But having neither side castle at all is really unusual and most such positions will be well out of distribution; and it’s very common for some pawns to remain on the second rank all the way to the endgame, where the option of moving one or two squares can have important timing implications.