Can I put a MBP (2012)'s hard drive into a Lenovo laptop and continue using MacOS?
It will simply not load at all.
Any non-Apple computer will not even recognise the hard drive's format type without extra software installed.

It is theoretically possible to get a non-Apple computer to boot to macOS/OS X, but it is against Apple's licensing agreement to do so &amp; is consequently off-topic on all of Stack Exchange.
It's also not a trivial task &amp; not guaranteed to work.