Anytime you get a promotion, especially when you are young, you may face an experience gap. Whether the experience gap is real or perceived, you have to address it.
When I was in the hospitality industry, I spent time as a cook, a banquet waiter, restaurant waiter, and I cleaned rooms. I worked most jobs in the guest side of operations.
Experience and exposure are the keys to overcoming the experience gap. Working your way through the operations with give you the experience you need and the exposure to what people in other roles in your organization are facing.
Plus, people will notice. If you spend all of your time in the office, people will continue to think you don't have experience and are out of touch. But if they see you putting in the time, they will know you have the experience.
The only way to get experience is to get out there. Reading about it and talking to people does not have the same impact as experience.