Hello
I understand your concern
This is called P.alba - it’s a common, harmless and non-contagious skin condition
It will take weeks to months for the pigmentation to return
Next Steps
Moisturise 2-3 times a day, use sunscreen, avoid excessive sun exposure
Health Tips
Avoid scrubbing and strong soaps
If there is no improvement in 4–6 weeks, or patches increase/spread/change, consider dermatologist reference or a skin scraping to rule out fungal infection.