Yes!
CodeIgniter 4 User Guide:
While the add() method seems to be convenient, it is recommended to always use the HTTP-verb-based routes,
described above, as it is more secure. If you use the CSRF protection, it does not protect GET requests. If the URI
specified in the add() method is accessible by the GET method, the CSRF protection will not work.
What did you Try? What did you Get? What did you Expect?
Joined CodeIgniter Community 2009. ( Skype: insitfx )