@AnacondaHL yes, we'll be doing those, as well as volumes 1 and 2. As @ReimuHakurei already said, our focus first is catching up to magazine raws, then filling in gap chapters, then older volumes. the gap chapters are an in-progress thing that gets slowly worked on between more active work on unreleased chapters. we're a bit slow now, with a staff of basically three people working on the series, but it's all coming.
You should optimize the PNG files before you upload them, you could be saving almost 50% of the file size losslessly. It would really save the site and everyone reading some bandwidth.
More info on how to do this in just one click: https://mangadex.org/thread/242338