There are some ideas here about the ability to remove the extent aspect of bookmark in the bookmark widget. Then you could use the bookmarks to toggle different sets of layer visibility. I think that's a good idea, and it would probably be a pretty easy fix to making the bookmark widget useful for more things than it was originally desgin for. I've kudoed them all. 😀
https://community.esri.com/t5/arcgis-experience-builder-ideas/bookmark-widget-ability-to-turn-off-zo...
https://community.esri.com/t5/arcgis-experience-builder-ideas/add-predefined-layer-visibility-config...
https://community.esri.com/t5/arcgis-experience-builder-ideas/turn-on-off-groups-of-layers-with-two-...
But maybe it would even be better and more logical to be able to do this in Map Layers widget. Make it possible to configure different sets av layer visibility for the users to choose from.
It would also be good if it were possible to control which set is used via URL parameters.
And in the best case it would be not only the layer visibility but also the expansion level for each group and nested subgroup.
