Here's the tutorial to resize the Taskbar...
This tutorial will show you how to change when to show small icons on the taskbar for your account in Windows 11 Starting with Windows 11 Insider build 22635.4291 (Beta) and build 27764 (Canary), you can enable the hidden feature to show smaller taskbar buttons (icons) by using the command...
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BUT... you need to perform another tweak, for the tutorial to work.
Part B... here, will allow the Taskbar size tutorial (above), to function...
By enabling or disabling certain 8 digit "ID numbers", you can turn Windows 11 features ON or OFF. In many cases, Vivetool is the "only" way to enable/disable certain features. Make sure you use 3rd party backup software, before you start "tweaking" Windows. Official tutorial...
www.elevenforum.com