No need to write the words like peace be upon him or roman Arabic for the darood now.
Muslim people strongly feel the name Muhammad if referred as the holy prophet be written as the full name. Even if they speak they need to avoid phrases like “peace be upon him“, often shortened to PBUH or SAW, from the Arabic:
Solution: In Microsoft word, if you need to refer Prophet Muhammad,
Just write “fdfa” and then press Alt+x. It will convert this to ﷺ readily.