We’re trying to set up common context to default in field values to records created from the list view of advanced list app. Is this supported? If so what is the destination region we should have the app subscribing to? List, detail, and detail list did not work for us.
No this isn’t supported right now. When adding on an advanced list defaults can come from two main places. First is from an app setting. Second is from a filled out advanced list header filter. So in your case, if you were able to fill out the fields in the advanced list header and then you hit add, then those fields would default. So that might be one way you could do this as well but directly through common context is not supported.