I realised that I am able to sign the application manually using apksigner but I don't get why it doesn't work with Qt Creator. Unfortunately, without being able to sign the app within Qt Creator I cannot publish it on the store as the "Add debug server" option is always enabled if the "Sign package" option is disabled. See below.
[image: 71e1370e-34cc-454b-a01d-8bcffe501454.png]