Popper takes an anchorEl and we're calculating the coordinates to mimic the anchor element. When using computedAnchor === 'node', could we not use anchorEl directly instead of having to implement the anchoring logic ourselves?

Alternatively, would it make sense to use CSS anchoring instead? We'd need to detect its availability and fall back to Popper, unfortunately.

Originally posted by @bernardobelchior in #19954 (comment)