The “ID cannot be improved” box is based on the community ID. If the observation only has one ID, it does not have a community ID. There was a change made recently that deactivates DQA items that are not applicable to the observation: https://forum.inaturalist.org/t/prevent-dqa-voting-when-pre-requisite-conditions-arent-met/49859/
For example, this prevents people from using the DQA for marking observations where the same species is not present in all photos if the observation has only one photo, and it also prevents new users from checking “ID can be improved” when uploading observations because they think they need to do this to get an ID.
The box should become active as soon as you get a second ID.