@Bulbik
The BIOS of your laptop should be able to support booting off an NVMe SSD, but the old OS Win7 natively doesn’t contain the required NVMe driver to be able to detect your SSD.
So the most important first step is to load or integrate the missing Win7 compatible NVMe driver.
You may find some additional information within the start post of >this< thread.
Good luck!
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