Good morning, afternoon. I have a domain on cloudflare.
I have family sharing with icloud.
I have an icloud email
My wife as a gmail email
my daughter has a gmail email.
I have created an alias for me using my domain name, an alias for my wife and an alias for my daughter.
I don’t know how to declare the alias on outlook on the iphone for my wife.
She as her gmail email, but cant send from the alias.
Sending email and configuring your client is not Cloudflare related and hence unfortunately beyond the scope of the forum. I’d refer to StackExchange or Reddit for that.