Finding a "full" database of Lebanese car plates for public download is difficult due to privacy and legal restrictions. However, you can access specific vehicle information through several official and third-party tools.
Anyone has access to the number plates Identification app? : r/lebanon lebanon car plate database full
Several mobile applications and websites offer lookup services. While some claim to "find owners," these often use historic or leaked data and may not be fully accurate or legally sanctioned for private use. Search Tools & Applications Finding a "full" database