It looks like Lionel's store has gotten the 2024 runs of the Union Pacific FEF-3 4-8-4 Northerns in stock now, so hopefully they should be getting to the dealers soon.
I have one of the greyhound versions on preorder, so I'm looking forward to seeing how it turns out. Lionel states in the catalog these versions will have number-specific details, so we'll see if they actually follow through this time around unlike the 2016 run.
I also noticed the Pennsylvania 4-8-2 M1's don't have a shipping date anymore on Lionel's store site, but aren't available yet. I'm hoping they didn't run into another color issue like the recent F-19 Pacifics did and had to go back to the factory for a repaint...