If these items are missing, the issue is likely a missing cream_api or steam_api configuration file. You will need to ensure that the DLC.txt (or similar) file in the game’s root directory lists all the DLC manifest IDs.
While specific gameplay tips can vary based on your playstyle and the content of the DLC, here are some general tips for playing Resident Evil 3: resident evil 3 build 5269288 update 3 2 dlc work