Yes, you can!
To prevent WordPress links in the Mail app from automatically opening in the WordPress mobile app, you can follow these steps:
- Open a WordPress site in Safari by typing its URL directly or copying and pasting its link
- Long-press on one of the site’s post or page links—like on a post title, for example
- In the menu dialog that appears, choose “Open”
- From now on, post and page links in the Mail app will open in Safari