If this app -- which many people had no choice but to rely on -- was supposed to be open source, then IMO it failed.
You had F-Droid maintainers willing to help bring the app to F-Droid and thus make it available to people without being forced to use the Play Store and accept Google's terms of service; however:
Finally – The EUPL 1.2 and the CC0 do not apply to photos, videos, infographics or other forms of images. It is therefore not permitted to reuse or transfer the image, unless the image explicitly states that it is permitted or you have received written permission of the Dutch Government. Such permission will not be withheld on unreasonable grounds.
I asked for permission several times but never received a reply. So the app had to be forked -- and looked much worse without the images -- for no good reason.