Hi @Lexignot ,
Thank you for posting in this community.
Per my knowledge, SharePoint column formatting does not currently support the object-fit property.
We can't achieve automatic scaling of images proportionally to column widths.
Thank you for your understanding!
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.