ANSWER:

This is not permissible to do after two rakahs or even at the end of the taraweeh as this is an innovation. 

Is it okay to recite the salatun NabiyyI.e the (Allahuma Salli Alah Muhammad…..)after every two taraweeh rakkat or shoukd this be done only after the final witr rakat?

Innovations, Taraweeh, Tahajjud and Qiyam-ul-Layl | May 18, 2019 7:09 am
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Shiek my question is if you come for taraweeh prayer and they already finished praying Ishaa and they are on the first rakat of the two rakats and You joined them when they finished should add two more rakat to complete your ishaa or you should do a whole ishaa(4 rakat) ?
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Is it allowed to khatam or complete the whole Quran to make a wish come true? Is it allowed to complete Quran in this intention?