Prefab models are not rendering in Editor

How to reproduce:
1. Open the attached "Angialo.zip" project
2. Navigate to Assets -> Prefabs -> Enemies
3. Observe "Demonboss_A.prefab" and "Minotaur.prefab"

Expected result: The models are shown and when you open the Prefab Editor models are shown in the Scene view
Actual result: No models are shown either in Project window or the Scene\Game view

Reproducible with: 6000.0.14f1

Reproduced on: Ubuntu 20.04
Not reproduced on: macOS Sonoma 14.5 (M1), Windows 11