save_post_{$post_type}

See hook in action

See this hook used in plugins:

Select Pluginatum-stock-manager-for-woocommerce.1.7.0learnpress.3.2.6.10wp-stateless.3.0wp-stateless.3.0.1wp-stateless.3.0.2wp-stateless.3.0.3wp-stateless.3.0.4wp-stateless.3.1.0wp-stateless.3.1.1wp-stateless.3.2.2wp-stateless.3.2.4wp-stateless.3.2.5wp-stateless.3.3.0wp-stateless.3.4.0wp-stateless.3.4.1wp-stateless.4.0.3wp-stateless.4.0.4wp-stateless.4.1.1wp-stateless.4.1.2