I would not be confident on advising on option one, and still no reply on your other thread Oneplus Nord with eos stuck at boot.
Reflashing the system with no wipe or format as described above is expected to retain your data.
Edit, bearing in mind the post now linked to your OP have you any guess why the failure might have happened ? I have had this happen spontaneously,but as I said earlier
(unless something else is the underlying cause of the fail)