Action block to send update content to a Slack channel

The custom automation block “Slack - notify channel”, allows to select some columns from items but does not allow to select its Updates.
I need one block that allows me to select the latest Update of an item and send it to a Slack channel.
There is already an Slack integration that does this, but its trigger sentence is too simple. With such an automation block, it would be possible to create triggers with “and” clauses.