As simple to use?
No, there definitely isn‘t one with an appropriate feature set. And none of them is a consequent free form editor.
All availabe apps are much more „code affine“ than Muse and many of them are web based and force you to use their web hosting.
If you don‘t bother, where your site is hosted, and you didn’t want to come close to coding, I think this one is quite fine: https://www.wocode.com
If you have no fear of changing the „mind set“of web site creation, just have a close look at https://webflow.com.
This is quite flexible, ha s an enormous feature set, but needs time to comprehend.
I can’t recommend using pure and genuine coding apps, if you like Muse‘s wait to create sites.
no there isn't and no Adobe will not be making one