If you need the SelectSimilar (or related QSelect and Filter) funtionality in AutoCAD Web app, try the "SelectSimilar" freeware LISP utility and "teach" your AutoCAD Web something new...
See:
https://www.cadforum.cz/en/selectsimilar-extended-selections-for-autocad-incl-lt-and-web-tip13878
Vladimir Michl, www.arkance-systems.cz - www.cadforum.cz
