Hello @Marty's Laptop,
Welcome to Microsoft Q&A forum.
Can you confirm that if you downloaded this Go extension? If so, this extension is for Visual Studio Code(It's different from Visual Studio IDE), you need to download Visual Studio Code to install and use it.
Currently, I don’t find related Go Language extensions which support Visual Studio IDE, for example Visual Studio 2022. You can double check here: Visual Studio Marketplace.
More details, see this document: Install and configure Visual Studio Code for Go development.
Have a nice day.
Sincerely,
Tianyu
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