For Intel Macs running macOS 11 Big Sur and earlier, the eDrive and Protogo tools can be used to create startup disks used for testing and repair from a secondary volume.
Apple Silicon Macs and Intel Macs running macos 12 “Monterey” and later require operating systems to be signed by the macOS installer, which means that the eDrive tool is not supported on these Macs. As such, the eDrive tool is unavailable in the Tools Selection on Apple Silicon Macs and all Macs running Monterey and later.
For Apple Silicon Macs and any Mac using macOS 12 Monterey and later, the best option is to create your own startup disk using the macOS installer, and then add Techtool Pro and any other utilities you may need after creating your startup disk.
To request that Apple provide the capacity for developers to provide tools like Protogo and eDrive, please use their macOS feedback page. In your feedback, indicate that you would like third party developers to be able to use the currently installed OS to create bootable backups and diagnostic disks.