Does anyone know what happened to USDe Coins and if it can make a comeback?
Shitcoins come and go. I don't think this one's coming back. If you're looking for dollar pegged cryptos, look for Tether or BitUSD (bitshares)
I wouldn't trust a single crypto solution for a 1:1 peg with the dollar or any other fiat whatsoever. All of them have already showed cracks. The last one, Tether, was losing their 1:1 ratio, very badly, at some point there were rumors of fractional reserve going on in Poloniex with Tether. Im not going to trust any of these "fiat-backed-coins" again because if their fiat reserves are gone, your BTC invested on these coins will be gone too.