Hi, @Leili vazietan ,
For adding multiple attachments, you will need to create a blank form to get the repeating table control. When you use InfoPath to customize the form for lists, the data is directly mapped to the list. As lists don't support repeating sets of data within one row, neither do InfoPath forms. You can only add a data connection to a library to hold the attachments.
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.