A questioner asks why do Muslims say peace be upon him when mentioning the Prophet’s name? Is it because they worship him?
It definitely does not mean any kind of worship of Prophet Muhammad (PBUH). We do not worship our Prophet (PBUH). When Muslims greet each other we say “peace be upon you.”
If we were to meet any prophets, we would says “peace be upon you.” However, because they are not here and out of respect for them we say peace be upon that certain prophet.
This greeting comes from the Quran. Allah says that the believers will be addressed by Allah and the angels in this way in Paradise.
We are asking God to bless our prophets and and bring them peace. It is definitely not any kind of worship.