I followed the installation steps to the letter and the integration was added to HA, but it just shows 1 entry and no sensors/devices/entities. This has been going on for over 3 months. I keep all my integrations and HA updates current, but no change with this one.
Are you using the Ecowitt integration that is included in HA or the one in HACS?
The HACS one has not been updated for some time and its probably better to be using the one integrated with HA.
Also, have you setup the weather station using the WSViewPlus app to use the correct webhook path and port? The setup for the HACS Ecowitt Integration is different to the HA one so it would be helpful if you can include what you have done for your setup.