Crystal Disk Info provides information about the health, temperature, and attributes of your SSD, but it does not directly indicate how much longer the SSD will last. The attributes section of Crystal Disk Info can give you an idea of the SSD's wear by examining the Wear Leveling Count, which represents the number of times data has been written to the SSD. However, this may not be an exact measure of lifespan as SSDs can continue to function even after reaching their maximum write endurance.
Since you are unable to find the SSD's TBW (Total Bytes Written) specification, one way to estimate its lifespan is to monitor the SSD's health and temperature over time. If the health starts deteriorating rapidly or the temperature rises significantly, it might be an indication that the SSD is reaching the end of its lifespan. It's also a good idea to keep a backup of important data, just in case the SSD fails unexpectedly.