YOU TOO CAN CREATE YOUR OWN CLONE WORKFLOW OR SCRIPT
I finally found the tool to clone bootable Big Sur volumes. Apple Software Restore or asr.
Originally Posted by BSD Systems Manual
ASR(8) BSD System Manager's Manual ASR(8)
NAME asr -- Apple Software Restore; copy volumes (e.g. from disk images)
SYNOPSIS asr verb [options] asr restore[exact] --source source --target target [options] asr server --source source --config configuration [options] asr restore --source asr://source --file file [options] asr imagescan --source image [options] asr help | version
DESCRIPTION asr efficiently copies disk images onto volumes, either directly or via a multicast network stream. asr can also accurately clone volumes without the use of an intermediate disk image.
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For full details open Terminal and enter "man asr" without the quotes.
This command is working on Intel Macs but remains a work-in-process for M1 Macs. Personally I will stick to using CCC or possibly TinkerTool System — I don't think i have the patience together a script working right.
If we knew what it was we were doing, it wouldn't be called research, would it?