Asslamualikum,Can i continue to make Dhuha Salah till Dhuhr Adan if i have Already Prayed 2 Rakht Dhuha Prayer(Ishraq) 15 min after Sunrise

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and  Messenger. 

There is no harm in continuing the Dhuha prayer until the sun is at its meridian (approximately ten minutes before the Adhan of Dhuhr), even if you have already prayed two Rak’ahs after the sun has risen and become fully above the horizon (about 15 minutes after sunrise). The Dhuha prayer is not limited to just two Rak’ahs; rather, it has no maximum limit according to the opinion held by some scholars.

In the biography of Imam Abdul-Ghani Al-Maqdisi, a Hanbali scholar, it is recorded: “He would pray Fajr, teach the Qur’an, and sometimes teach Hadith, then he would rise, perform ablution, and pray three hundred Rak’ahs with Al-Fatiha and Al-Mu’awwidhatayn (Surah Al-Falaq and Surah An-Nas) until just before Dhuhr,” as noted in Tadhkirat Al-Huffadh.

Allah knows best.