Didn't think it was possible on consoles. But tried to create a new save, and see it's possible to insert a seed number under advanced options. But little is known I suppose, because you can't easily check with a bot program or whatever, like people probably can on PC.
I don't see a way to check the seed if my actual save either, which could have been useful for others, since it had many red cabbage in year 1, and I was able to complete the CC without building a barn