You create a page or blog post with wordpress as usual. You probably use a special editor such as Elementor or WPBakery or the Gutenberg editor integrated in WordPress.
You proceed as usual and integrate the required Bitcoin Paywall element with these editors.
You can also integrate a shortcode command into the corresponding pages.
If you can create a page or a blog post, then you are also able to integrate the BTCPayWall.
For instructions on how the BTCPayWall elements work with the respective editors, see the post: Add BTCPayWall to WordPress.