Can’t delete the apps I don’t need anymore

Go to this link - How to delete apps - iOS 14 - Apple Community

Go to settings>general>iPhone storage>select the app>select delete

[If you do not see the delete option go to settings>Screen Time>content & privacy restrictions>iTunes & App Store purchases>delete app - change to allow. ]

Additional support links

How to delete apps on your iPhone, iPad, and iPod touch - Apple Support

Get Support

[If you do not see the delete option go to settings>Screen Time>content & privacy restrictions>iTunes & App Store purchases>delete app - change to allow. ]