First let see what fields show automatically in the profile card.
The content of only those fields that are showing on the Profile Card can be found.
User documentation about Profile cards: https://support.microsoft.com/en-us/office/profile-cards-in-microsoft-365-e80f931f-5fc4-4a59-ba6e-c1e35a85b501
Customize the Profile Card
Le mode Beta a été lancé en mars 2020: https://techcommunity.microsoft.com/t5/microsoft-search-blog/new-profile-card-customization-through-microsoft-graph-beta/ba-p/1216517
Permissions needed: User.ReadWrite, User.ReadWrite.All
The custom attributes are in Exchange Properties: Admin Center > Users > Active users > Mail > Edit Exchange properties.
Search: https://www.youtube.com/watch?v=QdbLDEVpQGs&t=1s 20 min ‘People search results are not customizable yet.’ October 2021
This search link doesn’t allow to see the profile card with the custom properties https://energir.sharepoint.com/_layouts/15/search.aspx/contact
This search link shows the profile card with the custom properties https://www.office.com/search/people?auth=2
This search link allows to open the people card compared to the previous one https://energir.sharepoint.com/_layouts/15/search.aspx/people