The way you have thermal strength indicated is orange-red-dark red. It's very hard to see if the thermals are ok, good or excellent.

Here is a Windy example. The thermals seem like they should be good over a large area (lots of red)

Compare that to a Skysight example at the same time and place. It's easy to see that the thermals might be good over only about 1% of the area.

The Skysignt color scale is much much more informative.

P.S. it was impossible to upload or paste images here.

Thermals are the rising fountains of warm air found under cumulus clouds. They can also be found without clouds ("blue thermals"). Glider pilots use them to stay up for hours and go places.