As a summary on this aspect:
The observed flight (takeoff) path and behaviour seem now to be looking very much like a slat-less take-off, which is somewhat more important than flap-less, albeit they often go together unless 2nd-segement climb performance becomes critical...
Slats provide ability to attain higher incidence whilst maintaining unstalled flow; flaps provide greater lift without necessity for higher incidence (reduce zero-lift incidence)...
Reported high aircraft incidence at rotation, subsequent loss of lift, including wing-dropping and loss of directional control are all very much pointing at slat-less and (now reported from one source) flap-less take-off.
Tragically, this very same situation seems to have taken place 2 years ago on the same type in the Canary Islands, but with just sufficient margins to allow 'hedge-hopping' flight until acceleration above safe flight speed for that configuration was achieved.
Take-off configuration warning systems designed and in-place to prevent this possibility may not have been working or compromised, in both cases.