I do not have a list ready… it would take awhile to compile.
Bear in mind that just because things are missing, does not mean that they will be added if requested.
The more developers that ask for an API feature give that feature a better chance.
Even so, in one case, multiple developers wanted a feature, but have been told not at this time. (Reason is the way the code under the hood is written. Such a feature would cause a higher number of crashes and bug splats.) We do have a hacky workaround, but it would be great if someday we didn’t need it. This was a request for a collection of open model objects (which would always have only one member on PC, until the Windows edition also becomes an MDI interface.)