DateTime Fields Problem

hello i have a problem with ci4 and datetime fields. i am using the code below

Code:

  protected $useTimestamps = true;
  protected $createdField = 'com_created_at';
  protected $updatedField= 'com_updated_at';

the comment created at and comment updated at are inserted fine in the database but when i try to display them with humanize  format it gives me an error

Call to a member function humanize() on string

the code from my view

Code:

$c->com_created_at->humanize()

ps im using different names than created_at and updated_at because i need them to be like that.