If you could even hold 20lb dumbells or an empty bar..if not, then all the lunges can be done bodyweight (or maybe against a band) and glute ham raise with bodyweight
Lunge Variants:
Walking Lunges, Stationary Lunges, Rear Lunges. With barbell on back, barbell held like front squat, Dumbbells, Hold it like a goblet.
Split squats, Bulgarian split squats, deficit Bulgarian split squats (barbell, Dumbell, Kettlebell)
Goblet Squats w/Dumbell
Double Kettlebell Front Squat
One legged stiff legged/romanian Dumbell deadlift
stiff legged Dumbell deadlift
deficit stiff legged/romanian Dumbell deadlift
glute ham raises