My paper is not shown in my Google Scholar profile
Google Scholar's automated indexing algorithm makes mistakes.  It can overlook some of your papers and it may also list some papers in your profile that are not yours.

To add a paper, press the "+" button and select "Add articles" to add articles off a list of possible matches Google found.  Or press "Add article manually" to enter title, authors, journal, etc., manually.

To delete a paper that's not yours, click the checkbox beside it and then click "Delete".