FWIW, typical in touring and Broadway is some form of business casual these days. Some companies that do a more "corporate" product, such as VEE, require either a company polo or collared shirt (be it generic company logo or show-specific), or at a minimum something else business casual with a show jacket over it.
Some venues do require shirt and tie, my first tour advised
FOH staff to have a suit as part of their wardrobe in case, although I haven't run into it personally.