SQL_CALC_FOUND_ROWS – High Memory Consumption on large Websites

Hi,
So, theres a query (SQL_CALC_FOUND_ROWS) who consumes a lot of physical memory on large websites.
I found this fix (https://wpartisan.me/tutorials/wordpress-database-queries-speed-sql_calc_found_rows) and applied in “functions.php” file of the theme.
Is working in the desktop, it no longers show the slow query, but in mobile the problem persists.
Where should i put the code to fix the mobile version too?

Thanks.

Calin, thank you for your assistance, it work.
Now, im still getting some high physical memory consumptions alerts, but for this query:

SELECT wp_posts.ID FROM wp_posts LEFT JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1 AND wp_posts.ID NOT IN (59675) AND (
wp_term_relationships.term_taxonomy_id IN (72)
) AND wp_posts.post_type = 'post' AND ((wp_posts.post_status = 'publish')) GROUP BY wp_posts.ID ORDER BY wp_posts.post_date DESC LIMIT 0, 3

and this one:

SELECT COUNT(*) FROM wp_posts LEFT JOIN wp_term_relationships ON (wp_posts.ID = wp_term_relationships.object_id) WHERE 1=1 AND wp_posts.ID NOT IN (4458) AND (
wp_term_relationships.term_taxonomy_id IN (4,48,49)
) AND wp_posts.post_type = 'post' AND ((wp_posts.post_status = 'publish'))

Do you know which part of the template is using this query?
Is a block? is the related articles?
Can you help me please?

Thank you!