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A better approach would be to start with a proper ISO downloaded directly from Microsoft and run a post-install script that installs any applications, drivers, and system tweaks you prefer. A similar project exists that I use and recommend for getting a fresh Windows install running on Steam Deck.
I suggest creating your own PowerShell scripts and distributing them via scoop, by making a steam deck bucket, some windows power users should be able to help, then just make a video on how to install those scripts, or try reaching out to Chris Titus on YT, he made a windows de-bloater tool using PowerShell scripts
You can try looking into NTLite, its a tool for building custom windows ISOs, (example here)