Update []: As promised by NIS America last week, two Trails through Daybreak 2 demos are now available to download on PS5 and PS4.
The first demo covers the game's introduction, leading up to Chapter 1 of the main story. This should take most players a few hours to complete, and you can then transfer your progress to the full game when it launches on the 14th February.
The second demo lets you sample the Marchen Garten — a huge, procedurally generated dungeon. This demo's more about giving you a feel for Daybreak 2's combat system, as it provides two premade parties to experiment with.

Original Story: Publisher NIS America has announced its plans to release a playable demo for Trails through Daybreak 2 on both PS5 and PS4.
Dropping next week, on the 24th January, the demo sounds rather robust. You'll be able to play through the game's opening up until the start of Chapter 1 — which clocks in at a good few hours. You can then transfer your progress over to the full game, which releases on the 14th February.
The demo also features a look at the Marchen Garten — a randomised dungeon in Daybreak 2 that lets you build your own teams from the game's large character roster. However, your progress in this mode won't carry over, and you'll be limited to two pre-selected parties.