Just wanted to leave this here:
I have just tried out @deuxpi’s custom component: https://github.com/deuxpi/home-assistant-custom-components and it works very well! Created a dev account at Nokia with some fake data and got it running in 5 minutes. Component needs to authenticate with Nokia at first run though, which does seem to conflict with Lovelace UI at the moment. But I hope, the developer will give the component a finishing touch and it will be merged to Home Assistant soon!