I’m starting to get unsure whether this is actually just a warning, or if this is actually a hard restriction. Will I meet any errors deploying this extension? It’s for private distribution. I cannot find anything about it in the docs.
This warning doesn’t stop you from deploying the UI Extension, but in my experience it does show this same warning to all merchants using the extension.
My app provides a lot of information for a single order, and merchants find it valuable to use the UI Extension even with the warning in place.