Windows 10 servicing update shows installed but OS version still lower
I am doing windows upgrade through SCCM windows 10 servicing(1709 to 1909) where few devices shows the update installed and also shows status compliant in SCCM deployment monitoring but when we checked the OS version it is still lower (i.e. 1709).
I got stuck in this scenario not sure what to check here.
Please help me as I need expert assistance here.