You can find the settings for Flux Checkout under WooCommerce > Flux Checkout.
Google API Key: You’ll need to enter a Google API key to use the address autocomplete functionality of Flux Checkout. See the Address Autocomplete section of this documentation to set this up.
Show Company field: Most businesses don’t require this during the Billing Details section of the checkout so we have hidden this by default to reduce the amount of unnecessary fields. Tick this option to show it if you do require this field. Note that the Company Name field will still be visible on the Shipping Address section.
Use Address Autocomplete: This option is used to enable or disable the address autocomplete functionality.
Header Settings & Checkout Style
These settings are self explanatory and only include styling options for the header, cart and checkout.