Version - 1.18.1
Fabric Version - 0.12.12
Replay Mod Version - Compatible Sodium 0.4.0-alpha6 for Minecraft 1.18.1 (compatible with Iris 1.1.5+)
Sodium Version - 0.4.0-alpha6

When I try to install Replay Mod for 1.18.1 and drop it into my mods folder, CurseForge does not even recognize it. I load up the game, and the Replay Viewer button is missing. I am using Sodium and a few other mods, and I made sure to install the sodium-compatible version. I even tried only installing Sodium and Replay Mod, and that didn't work. My best guess to why this is happening is that both Sodium and Replay Mod (sodium compatible version) start with the same naming convention: sodium-fabric-mc1.18.1-0.4.0-alpha6+...

Any solutions?

Please use the official support Discord at https://discord.gg/5GR7RSb next time.

What you have is only the ReplayMod compatible Sodium. It has a small fix, that is pending for the official version.

You need to also download replay mod. The sodium download is just sodium. It does not include replay mod.

Oh, that makes so much more sense! Thank you.