We would like there to be a 'fully supported' option to add a collection site dropdown list, not simply documentation to do it ourselves with the caveat that Innovative can't be responsible for whether or not it works. I've included a screenshot that shows how it actually doesn't work well on mobile, and we aren't able to do much about that. However, if there were a fully supported dropdown option, I think it's safe to assume it would be optimized for mobile use as well. This is what we would want.

This is not 'already supported' as was stated in the previous idea https://ideas.iii.com/forums/951766-vega-discover/suggestions/46814701-add-collection-site-dropdown-list-to-vega because as you can see in the documentation in Supportal here https://iii.rightanswers.com/portal/app/portlets/results/viewsolution.jsp?solutionid=240201122129203&guest=0, there is a clear note that it is on us to make it work for our site. As shown in the attached screenshot, we haven't been able to do so for mobile use.

"NOTE: Please note that all customizations made to the Vega Discover header are the sole responsibility of the library and that Vega Support is unable to assist with any custom code issues you may encounter. This code template is provided only as an example of how you might create a Collection Site drop-down if you would like to offer one in your custom header."