Someone told you that he doesn’t have time to pray 2 rak’ats sunnah mu’akkadah after Isha because they start taraweeh immediately. So you told him to pray it once he gets back home. If I do this, Witr will not be the last prayer I performed at night. Please tell me what to do wa
No problem in this as he is doing it because he was not able to pray it after isha.
You can even pray tahajjud or night prayers after praying taraweeh and Witr in the masjid, however you must not repeat the witr as witr is prayed only once per night.