If the white balance presets follow the standards set by most cameras, then:
Sunny “should” be 55 or 5600 K
Cloudy “should” be 6500 to 7000
Even with the exact same WB, two different cameras will not look the same. So don’t expect the Anafi to match your DJI footage. Different cameras tend to “push” colors a little differently. For example, my Mavic Air really seems to push a lot of magenta, regardless of WB. So, even with identical WB shot at the same time, there is always a little tweaking required if you want to match footage from different cameras.
I’m guessing Blue Sky is 8-9000 K. I am not basing that on actual testing with the Anafi, I’m just guessing because I vaguely recall that setting on some different cameras a while back. Sometimes they call it shade instead. As in full daylight, but you are shooting in full shade. More info on Blue Sky and Green would be great.