At the end of the page https://docs.sciml.ai/MethodOfLines/stable/MOLFiniteDifference/, the use_ODAE option is mentioned. It is unclear, however, what ODAE stands for. I have never encountered it before and I am trying to find some reference on SciML webpages and I keep failing.
Additionally, the link reportedly providing more information about it leads to "403 Forbidden" page.