Computer Configuration > Administrative Templates > Microsoft Edge WebView2 > Network settings
Both
HKLM\Software\Policies\Microsoft\Edge\WebView2
OBSOLETE: This policy is obsolete and doesn't work after Microsoft Edge 137. This policy controls whether Microsoft Edge supports Zstandard (zstd) content encoding. Enabled – Edge advertises zstd in the Accept-Encoding request header and can decompress responses encoded with zstd. Disabled – Edge doesn't advertise or support zstd content encoding. Not configured – The default behavior is to enable support for zstd content encoding. NOTE: This policy has been made obsolete starting with Microsoft Edge version 138 because Microsoft Edge now always supports zstd content encoding.