Using a 9x13 inch sheet pan or larger, layer chips, mozzarella cheese, pulled pork, black beans, and corn. Broil low on middle rack for about 10 minutes or until cheese is melted and pork is warm.
While the nachos broil in the oven, make your beer cheese sauce. In a large saucepan, melt butter on medium heat. Sprinkle flour over melted butter and use a whisk to fully combine. Cook for about 1 minute.
Pour in beer and milk; whisk to combine. Continue whisking while mixture thickens, about 2 minutes.
Add in cream cheese and whisk until combined.
Remove from heat, and add cheddar cheese and whisk until melted in.
Remove nachos from oven and drizzle with beer cheese sauce. Serve warm topped with your favorite garnishes!