Gosh, he’s gotten absolutely gorgeous! He’s probably an Olive Egger rooster, I’m guessing. It looks like he’s got a copper colored feather coming in as well. He’s going to be very cool looking when he’s fully grown.
Finally, I found some photos of a Steele Egger rooster, and it looks like they’re blue with golden leakage, not barred, unfortunately. Your guy could be an Egger rooster, but he has such an odd mix of traits that it’s quite baffling.
I’d say he was your blue cuckoo Marans, but for that beard and pea comb. He’s definitely blue, and has some barring, it looks like, and white legs and five toes 😵💫 My goodness, he’s a mess. But a gorgeous one! I’m guessing he’s a mix of some kind, for sure.