In the Block Editor panel, check the MEDIA / FORM / MAP / HTML box. When you select the media, it will open up a layer that gives many options on which types of media to add to a page. Select the "Social" option from the menu. Make sure the SOCIAL TYPE is set to "Links". You can now add any of your connected social accounts. Once you've selected the accounts you'd like to add, click the SAVE SETTINGS button.