Thanks for your updates and the god news on your progress. As I wrote in my earlier response above, knowing which taxonomy you are using for your terms is vital.
You wrote “it is still not showing the filter to be browsed from” You can find a simple solution for this feature in the “MLA Term List Examples” section of the Settings/Media Library Assistant Documentation tab. Give that solution a try.
The solution you found in the earlier support topic is similar to the “MLA Term List Examples” solution but relies on one of the MLA example plugins to process the add_filters_to
parameter. Both solutions require the form and all of the shortcodes shown in the solution, not just the [mla_term_list]
shortcode.