Hello ibrahimaksakal,
Thanks for using Apple Support Communities! We understand you are experiencing some issues with copying and pasting text on your iPhone. We are happy to help provide some guidance.
Are you having issues with copying and pasting any text that you select on your iPhone? Or does this only happen when trying to copy and paste a certain phrase or icon? Looking at the image you attached to your message, it appears to be displaying properly without any errors.
We would recommend restarting your iPhone and trying to copy and paste again. Take a look at the different methods of copying and pasting on your iPhone:
Select and edit text on iPhone
If you continue to experience issues, please reach out to Apple Support directly using this link: Get Support
Best Regards.