I have not yet seen the CHT-DHIS2 integration integrated as a DHIS2 app. The documents mentions
This means that you can build a DHIS2 app that pulls data from the CHT and imports it electronically into DHIS2. This would allow Data Entry to control the process directly from DHIS2 without having to access the CHT.
It can be done, but to my knowledge it hasn’t yet been done.