I just spoke to Dartford Council who told me to only report via their website, so most of my previous reports were not received.
https://windmz.dartford.gov.uk/ufs/BP_CONTRACT_UNI_CONNECTOR_LITE.eb?COMPLAINT_TYPE=EC732&WS_CODEVALUE=33&ebd=0&ebz=2_1707486417133
They are not aware of receiving any reports via this app.