First attack on Constantinople
It is written in Bidayah Wan Nihayah, Vol. 7, Pg No. 179 about the first army which attacked Constantinople:
Translation: Hadhrat Ameer Mu‘awiyah (May Allah be well pleased with him) attacked Rome in 32 Hijri and fought battles upon battles till he reached the city of Constantinople. As given in Tarikh Kamil, Vol. 3, Pg No. 25:
This shows that Constantinople was first attacked by Hadhrat Ameer Mu‘awiyah (May Allah be well pleased with him). There is no mention of Yazid participating in this siege. According to Bidayah Wan Nihayah, Vol. 9, Pg No. 76, Yazid was born in 26 Hijri, so in 32 Hijri, he was a kid of 6 years.