symbology in ArcGIS ONline does not show up in Collector app

[ShaunDillon1]

I have made symbology based on domains from a Layer file in Pro and made ArcGIS online map with that. It shows up correctly in ArcGIS online but when I upload the map to Collector app the layer which just was one simple symbol shows up correctly but the layers where the symbology is based on domain/attributes do not show up. It might be important that the layers do not contain data yet.

[RobertBorchert]

Collector does not cooperate with complex symbols.

can you show a snapshot of how your symbols are built

[ShaunDillon1]

These are not complex at all, and are just copies of what we have been using for years. Unfortunately the person who has done this before has left and I am trying to 'redo' what has been done before. So Im just trying to recreate what has been done and proven doable for years.

So it is just like this:

[RobertBorchert]

That is certainly not complex.  But by complex I meant multi layered or using more than one field to define symbols.

From what I looks like you have a single field and varied symbols.

Have you tried creating it in Pro and publishing it that way?

[ShaunDillon1]

Ah - yes it is simple - just based on one atribute.

I loaded an existing Online map into Pro - Imported symbology from existing lyr files and then uploaded/shared the maps to Online.

But I now see that the Domians are not in the data in Online although there are Domains on the geodatabase that I uploaded to ONline. So I think that is the issue. But how do I get it to keep/import/save the Domains from the geodatabase when creating/uploading the layer - this was done in ONline with the 'Add Item' button - 'From your Computer' and then used the zipped geodatabase.