There is a WMS service with more layers, historical ortophotos of the same area taken in different years.
https://geoportal.cuzk.cz/WMS_ORTOFOTO_ARCHIV/WMService.aspx?
When I was importing this URL as new content into my ArcGIS Enterprise content, I selected only some of the offered layers (only ortophotos of western part of the Czech Republic).
After completing this process, I realised that is no possible to change the used layers. In case of mistake by selecting, or when someone adds a new layer, the only option is to create a new content in ArcGIS Enterprise and replace the old one in all maps / ArcGIS Pro projects, where we used it.
=> Please add ability to change selected/used layers in the WMS registered as the ArcGIS Enterprise content.
