Limnos has explained that you cannot delete information from your Purchased list.
You can, however, delete any third-party apps you've installed on your phone and many (though not all) of the pre-installed Apple apps.
Remove apps from iPhone - Apple Support
If you do not see the option to delete the apps when folloing the above instructions, it probably means you have restrictions enabled. Go to Settings>Screen Time>Content & Privace Restrictions>iTunes & App Store Purchases and make sure that "Deleting Apps" is set to "Allowed".