I've been playing MUT 24 on the old gen (Xbox one X) since the early release on 8/15/23. I already opened all my Pre-Order packs, spent the 4600 coins and played a few games. But, the game was super stale on old gen. Every Head2Head game had play delays, and the Auction House was pointless. Moving to Current gen, I knew my team, coins, etc wouldn't transfer, but I figured it's still really early, so might as well do it now.
I moved to Xbox Series X and to my surprise, I opened Madden 24 X/S, log into MUT and I received ALL my pre-order bonuses, again. All the packs, and the 4600 coins.
Not sure if I lucked out, or if this is the way it's going for everyone, but I figured old gen users should know this if they're considering moving to the current gen.