I recently downloaded the mod when I found it in the Mod Browser in Prism Launcher. I was so hyped to use it as I've been waiting for it for years now, but many items are missing a proper model, showing up as a cube textured with a Pink and Black checker pattern, similar to missing textures in Source Engine games (e.g. TF2, Garry's Mod, Half-Life, etc.)

Items without their models:
-All Ceiling Fans
-Light + Dark Range Hoods
-Frying Pan
-All Stepping Stones
-Ceiling Lights
-Computer

I'm running CFM Refurbished Fabric 1.0.6 for 1.21

Mods that I have enabled (in case these may be causing issues) can be found in the following Google Drive link:
https://drive.google.com/drive/folders/1luH7j8QwN2y0MvLXQBUWe3cT4Src1f-G?usp=sharing

This is happening to me as well, with same version.
Not sure how to fix it.

I can't determine the mod, but sounds like one of the mods in your pack is overriding block model loading, which causes it to skip my custom block loader. The blocks listed in question are special because they use a different format. You wouldn't happen to know which mods in your pack could be modifying model loading?

Unfortunately I cannot reproduce the issue. At the time of this comment, 1.21 is no longer supported, and testing on 1.21.1 with the latest versions of everything, I did not encounter the issue. Are you able to update to a supported version and test? Could you also try an isolated test with only the furniture mod (and necessary libraries) installed?