iOS 12 and higher, and iPadOS, offers a quick way to share your password (though you should, of course, do this with care). You can use AirDrop to securely share passwords with someone using an iPhone, iPad, iPod touch, or a Mac.
To share a password
To use AirDrop to share a password, the person youʼre sharing with must be in your Contacts. To share with someone on iPhone, iPad, or iPod touch, ask them to open Control Center and allow AirDrop to receive items. To share with someone on a Mac, ask them to allow themselves to be discovered in AirDrop in the Finder.
° On your iPhone, go to Settings > Passwords.
° Tap the account you want to share.
° Tap Password, then tap AirDrop.
° Tap the contact you want to send the password to.
To receive a password
To receive a password, you must be in the sender’s contacts. If you haven’t already done so, allow AirDrop to receive items. When you receive a request to accept a password from someone else, tap Accept.
The password is saved on your iPhone or iPad, where you can view it and let iPhone automatically fill it in on the sign-in screen for the account.
(This how-to is based on my experiences and info on Apple’s support pages — where the images sometimes come from.)