You may use this release to install the extension on Visual Studio 2019 as it is currently unavailable on the Visual Studio Marketplace.
The extension available on the Visual Studio Marketplace will be updated to support Visual Studio 2019 as well when Microsoft will have actually implemented the following key important missing feature (please upvote it):
In the future, the Marketplace will allow you to upload multiple VSIXs to just one Marketplace listing, allowing you to upload your Visual Studio 2022-targeted VSIX and a pre-Visual Studio 2022 VSIX. Your users will automatically get the right VSIX for the VS version they have installed, when using the VS extension manager.
https://docs.microsoft.com/en-us/visualstudio/extensibility/migration/update-visual-studio-extension?view=vs-2022#visual-studio-marketplace