List<FeedItem> FeedItemList = New List<FeedItem>();
for (String id : recipientsIds) {
FeedItem post = new FeedItem();
post.ParentId = id;
post.Title = 'test title';
post.Body = 'body title';
post.LinkUrl = '/lightning/page/home';
FeedItemList.add(post);
}
if (FeedItemList.size()>0) {
insert FeedItemList;
}