Place drained and rinsed jackfruit in medium bowl. Using hands, pull apart jackfruit until completely shredded. Set bowl aside.
Heat large skillet over medium heat. Once pan is warm, add neutral oil and swirl pan to coat bottom with oil. Warm over medium heat until oil is hot and shimmering.
Once oil is hot, add shredded jackfruit. Cook jackfruit until edges begin to brown, approximately 5 minutes.
Add buffalo sauce and water to skillet. Stir to incorporate liquids, adding 1 additional tablespoon water as needed if sauce mixture is too thick. Once combined, reduce heat under skillet to low and simmer jackfruit in sauce 15 minutes or until liquid has evaporated.
While jackfruit simmers, add coleslaw mix, mayo, apple cider vinegar, Dijon mustard, sugar, dry mustard powder, and salt to large mixing bowl. Use tongs to toss coleslaw ingredients together until coleslaw mix is well-coated in other ingredients. Set coleslaw aside until ready to serve.
Once jackfruit is ready, scoop one large scoop jackfruit onto bottom bun. Top with one large scoop coleslaw and top bun. Serve warm with additional buffalo sauce and/or vegan ranch dressing as desired.