There are three apps and you probably found ObsIdentify, a remake of Seek. You have to choose ‘‘The Netherlands’’ or Belgium as country. In those countries you probably will find challenges. And I have to admit that ObsIdentify looks great. For data entry I use the app for Android, Obsmapp.
Correction, it seems the country is related to your GPS position, so you cannot fake it. You have to travel if you don’t have challenges…
https://forum.waarneming.nl/index.php/topic,490926.msg2506564.html#msg2506564
Observation & GBIF https://www.gbif.org/dataset/8a863029-f435-446a-821e-275f4f641165