dvda-author GNU/Linux builds against (upgraded) Ubuntu-latest are now up for grabs as Github Releases.
Currently Github is transitioning Ubuntu-latest from 18.04 to 20.4.
For each tag, a Github Actions workflow will automatically build and release the whole toolchain (dvda-author-dev, plus the complete build of dependencies, including libraries and documentation).
dvda-author-dev itself is an (almost) static build that will run on most Linux (and BSD) platforms. You may have to install libpng16 on your platform (it most often has been previously). This build will enable authoring of standard DVD-Audio discs, without menus, even with MLP and FLAC and tracks.
Authoring discs with menus may run into linking issues however with this build.
As a tentative way out, try adding --bindir bin to command line when running ./dvda-author-dev locally under the extracted local/ directory. You may have to rebuild ImageMagick (and possibly dvdauthor) from source and configure it to install locally to local/. If so, please use the source code inlined in the repository for the dependency software.