No new hooks added in 5.6.1 Below are recently added.

    jetpack_subscriptions_comment_form_submission

    hook (action): Fires on each comment subscription form submission.

    Source: modules/subscriptions.php:691

    jetpack_force_enable_gallery_widget

    hook (filter): Allow the Gallery Widget to be enabled even when Core supports the Media Gallery Widget View Example

    Source: modules/widgets/gallery.php:439

    jetpack_google_translate_widget_layout

    hook (filter): Filter the layout of the Google Translate Widget.<p>3 different integers are accepted.</p> <pre><code>0 for the vertical layout. 1 for the horizontal layout. 2 for the dropdown only.</code></pre>

    Source: modules/widgets/google-translate.php:85

    jetpack_disabled_raw_options

    hook (filter): Allows to disable particular raw options.

    Source: class.jetpack-options.php:439

    jetpack_sync_capabilities_whitelist

    hook (filter): Filter the list of capabilities that we care about

    Source: sync/class.jetpack-sync-defaults.php:439

    site_settings_update_wga

    hook (filter): Allow newer versions of this endpoint to filter in additional fields for Google Analytics

    Source: json-endpoints/class.wpcom-json-api-site-settings-endpoint.php:515

    jetpack_wga_classic_custom_vars

    hook (filter): Allow for additional elements to be added to the classic Google Analytics queue (_gaq) array

    Source: modules/google-analytics/wp-google-analytics.php:144

    jetpack_masterbar

    hook (action): Fires when menu items are added to the masterbar "My Sites" menu.

    Source: modules/masterbar/masterbar.php:993

    jetpack_removed_user_from_blog

    hook (action): Fires when a user is removed from a blog on a multisite installation

    Source: sync/class.jetpack-sync-module-users.php:368

    jetpack_user_edited

    hook (action): Fires when a user is edited on a site

    Source: sync/class.jetpack-sync-module-users.php:163