I attended the Eid prayer with the Messenger of Allah ﷺ, Abu Bakr, Umar, and Uthman. All of them prayed before the sermon, without any call to prayer or iqamah.
حدثنا محمد بن ربيعة حدثنا ابن جريج عن الحسن بن مسلم عن طاوس
شهدت مع رسول الله ﷺ العيد وأبي بكر وعمر وعثمان فكلهم صلى قبل الخطبة بغير أذان ولا إقامة
Its isnad is sahih. Muhammad bin Rabia Kullabi Ruwasi is trustworthy, one of Ahmad's teachers, and Ibn Main and others deemed him trustworthy. Bukhari included his biography in al-Kabir 1/1/79-80, and the hadith is given at greater length at 2004.