Remove output on selected page(s)

I’ve seen several questions to suppress or not show the Reading Time plugin output on a selected page(s). The inclusion of shortcodes to manually enable viewing on a post or page is OK, but is not suitable for an old site with hundreds of pages. Manually inserting shortcodes is an arduous task – though it can be automatized.

I wish that the plugin author enable removing plugin output on the posts/pages we want in a simple manner (supposing adding a remove_filter in page.php is ‘not simple’). How difficult is that to do? Perhaps we could get a shortcode which would “turn off” the output?

I wish to remove output on my front pages (several languages), which have a different template, but still it doesn’t work if I c/p the code to remove_filter in page.php in my child theme (instead it broke my site from loading pages). I’m a competent user of WP and have used it for 5+ years on several sites, but this problem is not very easy to fix.