Elden Ring Reflection of Strength like in Sekiro?

I know Elden Ring has only been out a week but I can't help but be excited for the future of the game. For those who havent played Sekiro in a while or at all, there was an update that gave us the chance to fight the main storyline bosses again whenever we want without having to replay the whole story. I feel this would lend itself very well to Elden ring given its long playthrough time and vast world. The chance to refight the demigods and even many of the optional smaller bosses at will would be great for a challenge and practice. It may be a bit tougher to do than in Sekiro given the player customizability, number of bosses, and have some more factors at play but this would be a feature I'd easily even pay for in an expansion. Anyone's thoughts?