Just subscribed to the Viz Manga app and the first thing I did was go to see if the uploaded chapters of Detective Conan/Case Closed have the "Detective Pictute Books" where Aoyama would draw a famous detective character and do a short write up on them
There's a list of them all here: https://www.detectiveconanworld.com/wiki/Detective_Picture_Book
Unfortunately it does look like there's a cutoff point in the Viz manga app where they stop being full volume scans and are just weekly chapter scans, though I'm not sure when it occurs (I tried looking up volume 52 and Ironside wasn't there :()