Old theses are no longer present on the published site

It seems that the 2021-2023 theses have all been removed from the `main` branch, but remain on the `master` branch. This broke many links around the web unfortunately, e.g. on Google Scholar, and I'm not sure if it was intended. Would you consider restoring the old theses to these directories? Since the theses remain public on `master` anyways, I can't imagine there is a licensing or access issue here.