The most amazing feature is coming on Instagram, you will get the facility to add photos to friends' posts.
Currently a carousel post on Instagram can contain up to 10 photos or videos. After the release of this feature, it is possible that the platform may increase this limit.

Meta-owned photo-video sharing platform Instagram is working on the most amazing feature. This feature is going to allow users to add photos and videos to friends' posts. That means you can post on your friends' wall. The feature may be released soon.
What is the feature?
This feature coming to Instagram has been announced by Instagram head Adam Mosseri. He said that an 'Add to Post' button will appear in the bottom left corner of the post, allowing users to add videos and photos to the post. However, the final control of the post remains with the main user who uploaded the post.
The feature is currently being tested. You may soon be able to add photos or videos to other users' posts through a new feature. However, the photo/video you add must be approved by the user whose post is originally from. Let us tell you that currently a carousel post on Instagram can contain a maximum of 10 photos or videos. After the release of this feature, it is possible that the platform may increase this limit. However, nothing has been confirmed yet by the company.
Additionally, the platform is also working on a feature that will allow users to place a short or looping video as their profile photo in Notes. Not much has been revealed about these features yet. Reports claim that Instagram is hoping to boost user engagement through such features.