Just because you can do it doesn't mean you should: Install Linux on NTFS – on the same partition as Windows

Never mind the practicality, feel the grief

As alert folks of a cross-platform inclination will have noticed, Paragon's NTFS driver was accepted into the Linux kernel, and was released as part of 5.15. This has had a consequence they probably didn't consider, though: you can now boot Linux from an NTFS partition.…

from The Register