Email Account
How does one transfer an Email account from an IPhone 6 to an IPhone XS Max?
Question marked as
if you mean the appleID then you can restore it with the others backup if they use the same ios version
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support
if they don't you can set it up using the same appleID
if it's just an added email account in the mail app then you can just manually add it to the new ios device
Add an email account to your iPhone, iPad, or iPod touch - Apple Support