Blocking adult content from your device is not something google can do outside of their services, please contact your service provider to change the setting of the adult content block on your service.
You can also explore using Google Family Link to prevent access to age restricted content on devices owned by your children, please see the Family Link info for more details on this:
Adult Content Blocks can only be lifted, or added by the bill payer for the phone service that you pay for internet access. Please contact your ISP, phone carrier, telecom company for assistance.