Yes, it is possible. You will need to create a new template file named template-sitemap.php in your child theme directory to replace the one in the parent and copy over the code contents from the parent and it’s referred file
Remove the lines 69 to 74 which read like this –
and for excluding the pages, modify the line 60 –
wp_list_pages(array('exclude' => '', 'title_li' => ''));
as per the instructions provided here –
Hope this helps.