HI MAHOKING,
Thank you for reaching out to Microsoft Q&A forum.
Maybe you wanted to install Visual Studio Code (where there is a "Show Activity Bar" command in View, Appearance menu), not Visual Studio 16.10.4, which is a different product? (But Visual Studio is also good for Visual Basic, maybe better).
Step:1 Open the VS Code
Step:2 Click the "view" option on the top bar.
Step:3 Click the "Appearance" option at View.
Step:4 Click the "Show Activity Bar" option at Appearance.
follow the referral link: https://code.visualstudio.com/docs/getstarted/settings
https://learn.microsoft.com/en-us/answers/questions/505377/activity-bar-not-showing-in-vs-code
Please inform us if the problem persists, and we'll be happy to offer further assistance.
Thank you.