Always-on display will be turned On only when charging to save battery. Guaranteed to work on Google pixel devices(it may work on other devices too).
Samsung Galaxy devices:
First try checking all my flows and search for your model.
If there is no flow made for your device, you will need to get the name and category of AOD setting using this flow: https://llamalab.com/automate/community/flows/7409 and then change block parameters in my flow manually.