Face tan not fading despite skincare routine

Hi everyone,
I’m dealing with stubborn facial tan that just isn’t going away. My skin looks uneven compared to my neck and it’s frustrating now.
My routine:
• Plum Niacinamide Face wash
• Bioderma moisturiser
• Sunscreen (Dot & Key, but switching back to Neutrogena as I didn’t feel much protection)

No home remedies or strong actives used.

Has anyone dealt with this? What actually helped you actually fade tan safely?
Thanks!