BuddyPress.org

The first question is if you have overloaded any template files? These would be located in themes/your-child-theme/buddypress

If you have files in directories in there then switching the BP Theme could cause errors.

If not then it’s worth switching to Legacy just to see if it works. However that’s not really solving the issue and if you are getting JS errors the same errors could stop the Legacy theme from working too.

Nouveau is the latest BP Theme ans it came with extra customisation options in Customizer but if you have not used these then there’s very little difference between the two theme views.

Might be worth letting me know what those error are so I can advise further. The other option would be to deactivate all of your other plugins and see if that fixes the problem but it’s a bit longwinded if you have some errors – better to address those first.

If you look in Settings>>BuddyPress>>Options you can see which template is configured, it’s either Legacy or Nouveau.

I think you are talking about something not added by BuddyPress. You need to refer this to the specific plugin developer in question.

Untested, but try:

function custom_format_buddypress_notifications( $action, $item_id, $secondary_item_id, $total_items, $format = 'string' ) {

    // New custom notifications
    if ( 'custom_action' === $action ) {
        
        $custom_title = "You have new custom notification";
        $custom_link  = get_permalink( $item_id );
        $custom_text  = "You have a new custom notification";

        // WordPress Toolbar
        if ( 'string' === $format ) {
            $return = apply_filters( 'custom_filter', '<a href="' . esc_url( $custom_link ) . '" title="' . esc_attr( $custom_title ) . '">' . esc_html( $custom_text ) . '</a>', $custom_text, $custom_link );

        // Deprecated BuddyBar
        } else {
            $return = apply_filters( 'custom_filter', array(
                'text' => $custom_text,
                'link' => $custom_link
            ), $custom_link, (int) $total_items, $item_id, $secondary_item_id );
        }

        return $return;

    }

}
add_filter( 'bp_notifications_get_notifications_for_user', 'custom_format_buddypress_notifications', 20, 5 );

@sitesfromash All the fields you keep in base group, those will be visible at registration page
For details you can check https://codex.buddypress.org/getting-started/guides/modifying-the-registration-form/

It’s simple to do.

Create and publish a page entitled ‘Regional Groups’.
Go to the BuddyPress Settings: yoursite.com/wp-admin/admin.php?page=bp-page-settings
For the User Groups setting, chose ‘Regional Groups’ from the drop down.
Then click ‘Save Settings’.

BuddyPress will use the Regional Groups page.
And you can use the Groups page for whatever you want.

Looks like that would be buddypress/groups/single/members-loop.php.

this line:

<?php if ( bp_group_has_members( bp_ajax_querystring( 'group_members' ) ) ) : ?>

Would be the one to change:

<?php if ( bp_group_has_members( bp_ajax_querystring( 'group_members' ) . '&type=alphabetical' ) ) : ?>

Hopefully that should work

There’s a plugin the converts a group to announce only, maybe that could be the basis of a fan page?

BuddyPress Announce Group

@hitesh4317 BuddyPress does not any inbuilt feature to display post listing at their profile. You might be using some 3rd party plugin.

BuddyPress does not manage what happens to posts when a user is deleted, I think that’s a WordPress function.

If you are talking about activity posts…

The default behavior is NOT to remove the content, but to refuse to post it and show the error message and leave the content in the textbox.
Are you running some other code re moderation?

Anyhow…
Unfortunately, there are no hooks in the moderation functions.
So you would need to remove the hook that is added in buddypress\bp-activity\bp-activity-filters.php

add_action( 'bp_activity_before_save', 'bp_activity_check_moderation_keys', 2, 1 );
add_action( 'bp_activity_before_save', 'bp_activity_check_blacklist_keys',  2, 1 );

and replace it will a hook that leads to a custom function that does what you want.

@pratibhasvaksha You can check the following doc

Navigation API

there is an old thread but need to testing in the current scenario
https://buddypress.org/support/topic/add-tinymce-to-activity-post-form/