The Failing flag is alarming, but it is odd that there is no flagged smart item. Per some research -
Common reasons for a "failing" status despite high life remaining include:
Increasing numbers of bad blocks.
Uncorrectable read/write errors.
Controller or firmware issues.
Problems with the SATA/NVMe interface.
A SMART attribute exceeding its warning threshold.
It is suggested you see if there is a manufacturers utility to check the drive. You might also check it with CrystalDiskInfo.