For #1152, Frontend needs to filter submissions by instance ID and entities by UUID. That's necessary for the cluster popup. If you click on a cluster of overlapping features, then Frontend will show a popup list of features (submissions or entities). For each submission in the list, it needs to show the instance name, and for each entity, it needs to show the label.

I'm thinking that the best way to achieve this is by filtering OData by __id. That's not currently possible on the backend, but if it's added there, Frontend will be able to send a request along those lines.