Is there a website where I can find all the information on all the IEO so far like, how many IEO was on Binance exchange, how much fund was collected, their current ROI etc? I am aware of the ICO/IEO reveiw sites but they are not dedicated to IEO info only, that's why there are not all the information I am looking.
I do not think there is a centralized ieo website platform that highlights all importance or rois.
But i recommend you the daomaker telegram channel, they give insights as regards roi (Return on investment) often and recently they did an infographic illustration of roi on binance ieo.
Perhaps that will help in your findings.