Hair lightening cream BA - any chance of it affecting my implants?

The depth of penetration of the cream will not reach the implants. There should be no problem unless you had a severe complication or reaction to the cream itself.

Dear Exciting995599,
it is unlikely that hair lightening cream will cause any issue with your implants. If you are concerned you can contact your surgeon.
Daniel Barrett, MDCertified, American Board of Plastic SurgeryMember, American Society of Plastic SurgeryMember, American Society of Aesthetic Plastic Surgery

Implants will not be affected by the cream, however if you have an allergic reaction to the cream or irritation, it will show on your skin.

At one year post op you are fully recovered from your breast augmentation. Using a hair lightening cream will have no impact on your breast implants. If you have any concerns be sure to contact your surgeon. Congratulations on your upcoming wedding!

You should be fine to use the cream, or shave, or laser, or use any depilatory treatments you would like. Congratulations on your upcoming wedding!