Shortcuts

Lucy ~ Have you set up an automation on device 2 which would be triggered by the message from device 1 shown in your screenshot? ...However, that automation still may not run without turning on device 2. I'm not sure, so consider asking on this Shortcuts sub-Reddit — it has many more Shortcuts experts than here on ASC.

Shortcuts User Guide for iPhone and iPad

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Lucy ~ The following automations are triggered automatically, but will ask you for confirmation before actually running the automation:

• Arrive
• Leave
• Before I Commute
• Email
• Message 👈
• Wi-Fi
• Bluetooth

Enable or disable a personal automation in Shortcuts on iPhone or iPad

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LucyWakka wrote: "...Is there no way to bypass that messages can’t be send automatically?"

Messages can be sent automatically. I just tested an automation triggered by Time of Day: It sent a message. But what Apple restricts you from doing is to run an automation triggered by Message without confirmation, i.e. receipt of a message. See if this helps on Reddit:

How do I activate a shortcut on device 1 from device 2?

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