Hello 👋.
various types of peels are available- single, combination, advance , newer
depends upon site, age, concentration, cause, skin type / tone - darker skin( causes more pigmentation)
Depending on site and severity of condition treatment can be started accordingly
Either it is taking longer time then usual/ skin may be too thick to act fast, orelse skin may be burnt too.
Next Steps
do consult online Dermatologist for better results