I am working on a tool that aims to make it easy to merge and visualize data from different sources.
This allows combining your activity watch data with other tracking data (google fit, oura, local weather, thermometer…) as long as they offer data export.
Here is the link where you can import data from the window-bucket: Load Activity Watch data into Dataflexor.
Data from other buckets should also work with a little configuration.
If you need any help or have feedback, i am eager to hear about it.