Current block-based widgets admin screen design.
I was wrong. I assured our readers that “the block-based widget system will be ready for prime time when WordPress 5.6 lands” in my previous post on the new feature’s readiness. I also said that was on the condition of not trying to make it work with the customizer — that experience was still broken. However, the 5.6 team pulled the plug on block-based widgets for the second time