You remove that box and install a double gang box. You have to figure out a way to remove it, or knock on down into the wall. You may be able to use deep boxes for more convenience.
But the other day while looking for dual rocker for my game room lights I came across these slick looking touch button style switches - https://www.amazon.com/LIVOLO-Indic...ree+rocker+single+gang&qid=1581960406&sr=8-28 and now I wanna switch over heh (They have single, dual, and triple button models)
awww drat... Quit ruining my dreams and stuffNice looking switch, but it's not UL listed.