For many, this version became the "archival" copy of the game. Because it stripped away the performance-heavy DRM and included the pre-order bonuses and Deluxe Edition content, it was the version people kept to ensure they could play the game at its absolute best without needing an internet connection or extra purchases.
This was the big headline. Many players found that the game ran smoother and loaded faster once the background DRM software was patched out by Capcom.
That sounds like you're looking at a specific "scene" release for the remake. Back in late 2019, that update was pretty significant because it removed Denuvo (the anti-tamper software) and added some cool tie-in content. Resident Evil 2 Update v20191218 incl DLC-CODEX
This specific version was basically the "definitive" version of the game at that point in time. It bundled together:
It ensured all the "What If?" scenarios (No Time to Mourn, Runaway, Forgotten Soldier, and No Way Out) were fully integrated and playable. The Context For many, this version became the "archival" copy
This was a small but cool addition that tied Resident Evil 2 to the then-upcoming Resident Evil 3 Remake. You could find a letter left behind by Jill Valentine in Kendo's Gun Shop.
This included the "Original Ver." Soundtrack Swap, all the extra costumes (like the Noir and Arklay Sheriff sets), and the "All In-game Rewards Unlock" which gave you the infinite ammo weapons immediately. Many players found that the game ran smoother
Are you planning on doing a with this version, or were you looking for a troubleshooting guide to get the DLCs to show up correctly?