Looking to display the title of Posts page on the frontend in Oxygen?

Here’s how:

Edit the template applied to the Blog Posts Index and add a Heading element.

Double click the text and click “Insert Data”.

In the Insert Dynamic Data lightbox, scroll down and click on PHP Function Return Value under Advanced.

In the Function Name field, paste single_post_title and click on the Insert button.

Save the template and now the Posts page title should appear on the frontend.

Sample screenshots:

Backend:

Frontend:

Reference: https://wpscholar.com/blog/get-title-for-posts-page-in-wordpress/