In Forge UI Kit @forge/react works great out of the box. But when I tried to use it with Custom UI it just didn’t work. Same with @forge/ui. After some digging on the internet found that they never supposed to work with Custom UI (zero mentions in the docs btw)
Another package that might help me was @atlaskit but it needs react 16.
What is preferred way to use atlassian’s design code in Custom UI?