wp_ajax_jetpack_sync_progress_check

See hook in action

See this hook used in plugins:

Select Pluginjetpack.8.4.1jetpack.8.4.2jetpack.8.5jetpack.8.6jetpack.8.6.1jetpack.8.8jetpack.8.8.1jetpack.8.8.2jetpack.8.9jetpack.8.9.1jetpack.9.0.1jetpack.9.0.2jetpack.9.1jetpack.9.2jetpack.9.2.1jetpack.9.3jetpack.9.3.1jetpack.9.4jetpack.9.5jetpack.9.6jetpack.9.6.1jetpack.9.7jetpack.9.8jetpack.9.8.1jetpack.9.9jetpack.9.9.1jetpack.10.0jetpack.10.1jetpack.10.2jetpack.10.2.1jetpack.10.7jetpack.10.9jetpack.11.0jetpack.11.1jetpack.11.1.2jetpack.11.2jetpack.11.3.1jetpack.11.3.2jetpack.11.4jetpack.11.5.1jetpack.11.6jetpack.11.8jetpack.11.8.4jetpack.11.9jetpack.11.9.1jetpack.12.0jetpack.12.1jetpack.12.1.1jetpack.12.2.1jetpack.12.3jetpack.12.5jetpack.12.6jetpack.12.6.1jetpack.12.7.1jetpack.12.8jetpack.12.8.1jetpack.12.9jetpack.12.9.3jetpack.13.0