That application comes from the MDM provider. When it’s missing, that means the enrollment profile is broken or was removed. You would follow the enrollment process (typically going to a web address and downloading a new copy of the enrollment profile) or contact the help desk to get them to send you a new enrollment.
When you accept the enrollment, that application is one of the first things the MDM delivers to your Mac.
Since your MDM uses JAMF, you can open terminal and get more details with this command.
sudo jamf manage
If the MDM allows your credentials to re-enroll and the jamf binary is still also installed, you can possible re-enroll
sudo jamf enroll --prompt