When i enable forms default pattern i only see its description but the form itself isn't rendered.
Tested on 2.0.0 and core 10.2.1
Enable Forms defautlt pattern in admin/config/styleguide/settings
View the styleguide, no form is displayed in FORMS section and the form variable is null when debugging related twig.
I couldn't find how the form is populated.
Active
2.0
Code
I think this will be fixed by 🐛 Need accessCheck for entity queries Needs review .
I applied the patch and it didn't fix it. I also don't see any code that would populate {{ form }} in the template.