You can pre-fill the fields in the form by passing the parameter from the Lead structure with values in the URL of the page containing the form.
Forms can be automatically pre-filled with lead data by passing parameters in the format data_fieldname=value in the query string, where fieldname corresponds to the field name defined in the form structure by the Admin. This reduces friction and improves the user experience by displaying already known information (e.g., name, email, phone number). To use this functionality, the Pre-filling Fields feature must be enabled in the Offer settings.
If you want to generate a pre-filled URL for each lead, you can create a hidden form field that combines all lead values in this format:
data_fieldname1=value1&data_fieldname2=value2&data_fieldname3=value3
It is recommended to store it without the domain/URL so you can append it to any destination URL (e.g., in emailing).
You might also want to check out the Auto submit feature, which automatically submits the pre-filled form without requiring user action.