Block an overpopulated folder from expansion?

Hi - One of my folders has more than 11,000 entries; they’re generated iFrames that display HTML files located outside the vault. Expanding this folder in navigation locks up Obsidian for an extended spell to render an endless and fairly unuseable column of numbered files. Sure, I can usually avoid clicking on that one folder, but now the Expand All capability has the same effect.

So I’d like to be able to exclude one or more folders from expansion in the File Manager via Settings, just as we can exclude them from Search, Graph View, etc.

Thanks for considering! Jerome