Yes, you absolutely have the right to publish your own photos on multiple different platforms.
Copyright normally belongs to the person who took the photo. So if they are your photos and your listings, there is nothing illegal about using them on Leboncoin, Vinted, Ebay, Marketplace, etc.
The problem is that automatic or abusive reporting is very common on Vinted. Some users report competing listings en masse, and automatic moderation systems can sometimes wrongly consider it to be “duplicate content” or “photos found on the internet”.
This happens especially when:
• the same photos circulate on several sites
• the photos have already been indexed on Google
• several accounts use similar photos
• listings are reposted often
• manual reports accumulate
Many sellers have already encountered this problem even when using their own photos.
To reduce blocks, some sellers add, for example:
• a differently taken photo on each platform
• a slightly different background
• an object or paper with username/date
• a different crop depending on the site
This sometimes helps automatic systems recognize that these are indeed your own listings and not a fraudulent copy-paste.