Can confirm from personal experience. Had to charge my XS Max at the end of the day with normal-heavy usage, because it would go down to around 15%. With light usage, it would be once every 1.5 days.
With 11 Pro Max, I charge once every 1.5-2 days with regular usage. This is truly amazing to me, because I never have to worry about my battery dying midway through the day, and it feels extremely freeing.