BuddyPress is not sending emails with activation code to users after they register to the site

Please check that your WordPress email configuration is correctly setup and if emails are being sent for other actions.

If you are using an email plugin (i.e.: https://wordpress.org/plugins/wp-mail-smtp/), please check if this works for you: https://wordpress.org/support/topic/activation-emails-from-forums-not-sent/.

Otherwise, please contact the BuddyPress support team (https://buddypress.org/support/) as they will be able to assist you further with this: https://buddypress.org/support/search/activation+email/