See madam baggy eyes can be because of reasons like high salt diet ,
thyroid disease ,aging but you are only 27 so not the cause , lack of sleep but you mentioned that you sleep for 8 hours everyday so that also ruled out, allergies that needs to be evaluated , smoking , then are other reasons also.
The injection you took must be hyaluronic acid basically used as a filler.
Next Steps
consult a dermatologist in your place physically for better evaluation.
Health Tips
Reduce your salt intake.
Cut your alcohol intake if possible just avoid it.
stop smoking if you do. it includes shisha vape joints everything. just stop if can't then reduce.
Can use caffeine ( can put a child tea bag on closed eyes.
should have an undisturbed sleep of 6 to 8 hours.
drink plenty of water. 4 liters per day.
add potassium to your diet like banana
avoid direct sunlight.( use umbrella)
get a
thyroid profile done ( t3 , t4,
TSH)
and a
complete blood count to rule out anemia as anemia my lead to dark circles.