Did McLaren's 'mini-DRS' rear wing trick help Piastri keep Leclerc at bay in Baku?

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https://www.autosport.com/f1/news/did-mclarens-mini-drs-rear-wing-trick-help-piastri-keep-leclerc-at-bay-in-baku/10654905/

Some intriguing behaviour of the McLaren rear wing in Baku points to a unique way the team may be boosting its straightline speed