If you want to do an adaptation of Beauty and the Beast and get rid of all toxic consent/coercion/manipulation elements in the relationship entirely, it is easily done by not making the Beast be the one imprisoning Beauty with him.
A fairy laid a curse on him. Curses are all about Equal and Equivalent Exchanges. Her father steals a rose, which is like eating the pomegranate seeds or eating fairy food. The Beast doesn’t trap him there, the curse does. Her father cannot leave unless someone takes his place. None of this is the Beast’s doing. It just happens be at the Beast’s house, because that’s where the fucking curse is.
Then the Beast and Beauty are just cellmates or unhappy roommates, and the slow burn romance can happen without so much in the way of unpleasant power dynamics.