It never shipped to Insiders or the general public. The number itself originates from Microsoft’s internal compilation of Windows 11’s Canary Channel, and it has been incorrectly reattributed to Windows 10 by third-party tools, sloppy reporting, and deliberate misinformation.
Millions of users despise Windows 11’s system requirements (TPM 2.0, Secure Boot, 8th-gen Intel or newer). They desperately want new features on their old but perfectly capable hardware. Build 23100 became a symbol of that fantasy. windows 10 build 23100
While there is some online discussion and a few "repacks" circulating under the name "Windows 10 Build 23100" It never shipped to Insiders or the general public