>>3023794It's probably the version of the LORA you downloaded was trained against a different model setting than the currently loaded model. When a LORA is trained it has settings for SD1.5, SDXL, SD2, etc. By default A1111/Forge/Reforge hides LORAs it detects weren't trained against the model type you're using.
In the Settings tab, go to Extra Networks on the left hand bar and there's a checkbox to always show all LORAs instead of hiding different versioned ones by default. Pic related is a guide.
Sometimes LORAs work decently even if they were trained for a different version, sometimes they don't, you'll need to give it a shot and see what results you get.