That’s simply due to the repository VSCodium uses to pull extensions from (in the name of using open source extensions). Other (proprietary) extensions can be installed by downloading the .vsx file and installing manually. In most cases, though, open source alternatives to proprietary extensions exist.

Check out VSCodium, which is open source telemetryless binaries of VSCode

Edit: Nevermind, it seems you already use it

!lemmysilver

Other people beat me to it on the other post, but none here!

Having worked in penetration testing before, one tool I used to query SQL databases represented unknown characters as an underscore (_) before the character gets brute forced.

Bonus story: I used to set the hostname for my phone as a transparent character, so it wouldn’t visibly show up if someone ever did a network scan. I accidentally fooled myself with this while doing a network scan, and got frustrated why the “mystery device” wouldn’t load a hostname.