Three lying poses: rearlying, frontlying, sidelying. Use high weights 0.8-1.2 for clean angles.
Note: "profile" tag may help improve sidelying angle (not confirmed).
Test Grid - Lying Views LoRA 
Weights: 0, 0.3, 0.5, 0.7, 0.8, 1.0
Keywords: rearlying (seed 12345), frontlying (seed 23456), sidelying (seed 34567), lyingview (seed 45678)
Weights: 1.2, 1.4, 1.6, 1.8, 2.0
Keywords: rearlying (seed 12345), frontlying (seed 23456), sidelying (seed 34567), lyingview (seed 45678)