Hello,

The phone number and website have been in the object since version #1.
https://www.openstreetmap.org/node/10178835187/history

It is always a good idea to look at the tags of an object before editing.

contact:phone and contact:website is the current best method to add contact details.  Do not rely solely on the "preset boxes" of the iD editor, this software is not reliable and will hide essential data from you.

Happy mapping.