Do we know what we are missing?
Do we have any aural rumors of the works lost in Alexandria?
For instance, is it possible that another potential work of the bard Homer may have potentially slipped through the cracks?
or even authorships by other names that were potentially his equal?
Yes, we know the titles of many works that were lost, but nothing was "lost" at Alexandria (that is, there were no texts that existed only there and were lost when the library was destroyed). This older post goes into more detail.