Mail Rules: Several loaded questions.

Good Day,

I want to know which gives the broadest, most thorough effect in Mail Rules.

I can set rules on iCloud.

I can set rules on macOS Mail.

I cannot set rules in iOS.

Can I set rules in one place and have all of my mail sorted to my sense of order?

Can I import/export macOS Mail Rules to iCloud, and vice Versa?

Thank you all most kindly.