The original inspirations for several story beats in both Elden Ring and Sekiro come from Fist of the North Star, not only Berserk. This video showcases several examples. Please subscribe!
FYI: The look of Radahn and Maelina are also based on Berserk characters, since obviously there's a major thematic difference in the genres. Miyazaki likes to mix his inspirations, like any good writer does. However, how cool would it be for Miyazaki to do a Hokuto no Ken Game? Or a Berserk game?