As more players use smartphones, online casinos prioritize mobile-first designs...

https://delta-wiki.win/index.php/What_Game_Studios_Show_Up_on_MrQ%3F_A_Deep_Dive_into_Mobile-First_Casino_Entertainment

As more players use smartphones, online casinos prioritize mobile-first designs that fit quick gaming sessions. They simplify navigation to help users discover games easily on smaller screens