FilterMeshBoolean and IONXS missing from 2021.07

FilterMeshBoolean and IONXS are two new plugins that have been added in the last version of meshlab, however they are missing in the version from flathub.
Here atteched the list of loaded plugins in the flathub version (left) and from the appimage downloaded from the official repo (right).


FilterMeshBoolean plugin requires on linux some additional external libraries installed on the system: gmp, boost and cgal (`apt install libgmp-dev libcgal-dev libboost-all-dev` on ubuntu).
IONXS, on the other hand, should be easy to build. Just be sure to clone recursively the meshlab repo, in order to include the nexus submodule.

Is there an easy way to add the missing plugins also in the flathub release?

[edit] I removed the stuff about xerces, I had mistaken with another plugin (e57) which is actually built correctly on flathub!