Difference between 晚安， 晚安安，安安, and 晚安啦
晚安 is the standard phrase for "good night"

晚安安 is an incorrect usage of reduplication. Please don't use it.

安安 is also an incorrect usage of reduplication. Not to mention it sounds like a 'baby take' (omitted 晚 and reduplicate 安) Please don't use it to any adult.

晚安啦 is just 晚安 adding a final particle after it.  Depend on the tone and pitch, it adds casual or affectionate feeling to the phrase