It seems to me that in recent years IEO it began to lose interest from investors. This is due to a decrease in profitability from this type of investment. Even on such exchanges as Binance yield fell very much, which affected the popularity of the IEO and the price of the BNB coin. If things go on like this, then IEO will become as unpopular a way of investing as ICO.
Do you say "in recent years"? If I'm not mistaken, then IEO became popular only in 2019 and already has a demand and interest from many investors (although the hype has really declined at the moment). It is not known what awaits us in the future, but I believe that good and promising projects will still be on some exchanges (I mean IEO).