Redirect BuddyBoss Users to "Update Avatar" when this is missing. Allows PMPro pages access for checkout/cancellation etc.

redirect-missing-avatar-buddyboss-pmpro.php

<?php
/**
 * Redirect logged-in users with no BuddyBoss/BuddyPress avatar to the
 * membership account page so they can upload a profile photo.
 */
function my_redirect_missing_avatar_to_account() {
	if ( is_admin() || wp_doing_ajax() || wp_doing_cron() ) {
		return;
	}

	if ( ! is_user_logged_in() ) {
		return;
	}

	if ( ! function_exists( 'bp_get_user_has_avatar' ) || ! function_exists( 'bp_core_get_username' ) ) {
		return;
	}

	// Avoid an infinite redirect loop on the change-avatar screen.
	if ( function_exists( 'bp_is_user_change_avatar' ) && bp_is_user_change_avatar() ) {
		return;
	}

	// Don't redirect away from any PMPro page (account, checkout, login, etc.).
	global $pmpro_pages;
	if ( ! empty( $pmpro_pages ) && is_page( array_values( $pmpro_pages ) ) ) {
		return;
	}

	$user_id = get_current_user_id();

	if ( ! bp_get_user_has_avatar( $user_id ) ) {
		$username = bp_core_get_username( $user_id );
		bp_core_add_message( __( 'Please upload a profile photo to complete your account. This is required to resume access to our site.', 'buddyboss' ), 'error' );
		wp_safe_redirect( home_url( '/members/' . $username . '/profile/change-avatar/' ) );
		exit;
	}
}
add_action( 'template_redirect', 'my_redirect_missing_avatar_to_account' );