No new hooks added in 10.9.1 Below are recently added.

    jetpack_stats_footer_js_data

    hook (filter): Filter the parameters added to the JavaScript stats tracking code.

    Source: modules/stats.php:299

    jetpack_stats_footer_amp_data

    hook (filter): Filter the parameters added to the AMP pixel tracking code.

    Source: modules/stats.php:286

    jetpack_block_editor_pocket_casts_feature

    hook (filter): Enable Pocket Casts block variation in block editor context.

    Source: class.jetpack-gutenberg.php:712

    jetpack_sync_get_themes_callable

    hook (filter): Filters the output of Sync's get_theme callable

    Source: jetpack_vendor/automattic/jetpack-sync/src/class-functions.php:661

    jetpack_backup_initialized

    hook (action): Runs right after the Jetpack Backup package is initialized.

    Source: jetpack_vendor/automattic/jetpack-backup/src/class-jetpack-backup.php:117

    jetpack_my_jetpack_should_enable_add_license_screen

    hook (filter): Acts as a feature flag, returning a boolean for whether we should show the licensing UI.

    Source: jetpack_vendor/automattic/jetpack-my-jetpack/src/class-initializer.php:90

    jetpack_wordads_loaded

    hook (action): Fires when the WordAds package has been initialized.

    Source: jetpack_vendor/automattic/jetpack-wordads/src/initializers/class-initializer.php:71

    jetpack_wordads_init_wordads_package

    hook (filter): The filter allows abortion of the WordAds package initialization.

    Source: jetpack_vendor/automattic/jetpack-wordads/src/initializers/class-initializer.php:32

    jetpack_wordads_abort

    hook (action): Fires when the WordAds fails and would fallback to MySQL.

    Source: jetpack_vendor/automattic/jetpack-wordads/src/initializers/class-initializer.php:40

    jetpack_wordads_should_add_wordads_submenu

    hook (filter): The filter allows to ommit adding a submenu item for WordAds.

    Source: jetpack_vendor/automattic/jetpack-wordads/src/dashboard/class-dashboard.php:89