Salaams everyone!!!!!!!!!
Yaa we can recite Durood (Salawath on Noble Rasoolullah SAW (PBUH) ). In Al Quraan mentioned. "Innallaha Wamalaikathahu Usalloona Alannabi Yaa Ayyuhallazeena Aamanoo Salloo Alaihiwa Sallimoo Thasleema" it mean "Allah and Angels are reciting Durood on Prophet Muhammed rasool SAW (PBUH) everytime and Ooh Poeple who have faith.... Read Durood on Noble Prophet Muhammed rasoolullah SAW (PBUH)" from this Quranic word Great Scholars explains as per below. " We can recite Durood (Salawaath) on Noble Prophet Muahmmed Rasoolullah SAW (PBUH) anytime except some reason. When we are in Tilet cannot recite durood. other than any place and any time we can recite durood. As per this explanation we can recite Durood before Azaan, After Salah, After Azaan, After reciting Quraan, Before reciting Quraan.. ect....
Wassalaam!
There is a difference between the permissibility of doing an act in general and doing an act regularly. For example, praying nawafil (optional prayers) is allowed at any time except after fajr until the sun rises fully and between asr and maghrib. But if you start praying four raka'ahs (units of prayer) before fajr everyday non-stop then it becomes a bid'ah. Why? Because the Prophet
who is better than all of us only prayed two raka'ahs before fajr, so we cannot change this for whatever reason.
And just like this, we cannot start introducing acts of worship without evidence. You can read salat and salaam upon the Messenger
at any time, but to attach it to an event or to make it regular is a bid'ah because we have no evidence that the Prophet
asked the muslims to do it, nor any evidence that his companions did this. And Allaah knows best.