Of course! The sailor-path can be a bit tricky to access. I've made it easier to get to in this update (it used to be even more obscure), and I'm still looking at ways to make it more accessible in the future. For now, do the following:
Spoilers warning below for those new to the game:
Leave with Kate > Have an encounter between Sarah and Belmont, either alone or together with Kate (either option should work) > Then decide to join the mercenaries. You can select any of the 3 training options, and this should now trigger a bonus scene where Sarah meets Belmont again. > Confront him and keep confronting him and this should put you on the sailor route.
As for the content on the other paths, it depends on where exactly they're cutting off for you. Some of them are just at their current story end.