Cannot install or even find this extension in Extensions

[shoorick]

This extension isn’t listed so I can’t install it via Extensions.

To Reproduce
As described at https://marketplace.visualstudio.com/items?itemName=aswinkumar863.smarty-template-support, press Ctrl+P then enter command ext install aswinkumar863.smarty-template-support, see message “Press Enter to search for extension 'aswinkumar863.smarty-template-support'.” press Enter ↵ and then go to Extensions.

Expected behavior
Link to this extension expected but instead I see long list without Smarty related extension at all. Searching by single word aswinkumar863 returns empty list — No extensions found.

Screenshots

Context
VSCodium Help → About:

• Version: 1.66.0
• Commit: e18005f0f1b33c29e81d732535d8c0e47cafb0b5
• Date: 2022-03-31T09:48:14.148Z
• Electron: 17.2.0
• Chromium: 98.0.4758.109
• Node.js: 16.13.0
• V8: 9.8.177.11-electron.0
• OS: Linux x64 4.19.0-20-amd64

[shoorick]

Installation from VSIX was successful.