Profile pictures from sender not showing

Hello,

I have noticed a change in the desktop client for Outlook. Previously, the senders' initials or profile pictures were displayed next to their email addresses in my inbox, but this is no longer the case. This feature is still present in Outlook Web App (OWA) and the new version of Outlook, but it seems to be missing from the classic version.

I am currently using Windows 11 and have been unable to find any settings to restore the display of senders' contact pictures. Could you please advise on how to address this issue?

Thank you.