I use Bixby everyday, it's fast easy. Shuts off my wifi when I leave home everyday, turns to vibration mode at work, adjusts my brightness at home plus a ton more. Setting a reminder is quick and easy. Thought about changing phones to a gaming phone but Bixby made me keep Samsung.
Interesting stuff, I can see I could remove some 3rd party apps that currently fill those functions. Tasker being one. I had no idea that level of detail was within the phones standard loadout. I remember Motorola had a very basic smart routine type thing some years back, but this is way beyond that.
Questions I have: Switching my old settings to a new Samsung device, and sharing or integrating with non Samsung devices like my wife's iPhone are kind of perennial questions for me. Cheers from the Canada, I recommend trying to speak to bixby with our weirdo accent, just for kicks mate. ;)
To get everything switched over from your old phone simply use Smart Switch! As for integration for iphones. Gets a bit tricky haha depends on what you're after to do!
Unfortunately you can't share them. It's due to it being device specific. The automations tie into stuff within your Samsung Account and specific apps and settings on the device itself.