Hi @anumathew51097,
You can not edit the main theme, the only option is available to edit your website is using the child theme; The solution to achieve it is customization. To do this, first, you need to use the child theme. You can copy the meta file from the partials folder in the child theme following the same path and then do necessary changes.
For more information about that, please follow the steps below:
By using FTP or cPanel access (if didn’t use the localhost), Go to this directory:
wp-content\themes\oceanwp\partials
Find your template which you want to customize and copy that template file(in your case, for example, you need to change the date on the blog pages, so you need to use the blog template(s): https://i.postimg.cc/brv9gn9s/image.png).
Then head over to the same path on the child theme. There isn’t an entry folder as a default on your child theme, so you need to create a new one(one time).
Example: If you want to change the HTML tags structure in the single blog posts featured image for standard post format, all you need in this step is:
1- Head over to your WP root > wp-content > themes > oceanwp > partials> single > media path.
2- Then, find the “blog-single.php” file and copy this file.
3- After that, back to the themes folder (wp root > wp-content > themes) and go to oceanwp-child-theme-master folder.
4- Create a new folder into the child theme with the “partials” name.
5- Go to the /partials/ folder and create a new folder with the “single” name.
6- Go to the /single/ folder and create a new folder with the “media” name.
7- Go to the /media/ folder and paste the “blog-single.php” file here.
* Please check this screenshot: https://i.postimg.cc/sxjYTWyt/image.png.
I hope that helps,
Best Regards