From 2019:
https://www.skysports.com/watch/video/sports/football/12311340/kane-waving-goodbye-to-spurs
From 2021:
https://www.telegraph.co.uk/football/2021/05/19/tottenham-chairman-daniel-levy-admits-losing-sight-clubs-dna/
From last weekend...
Utter bullshit that Mac was 'waving goodbye'. Seem to remember Kane 'waving goodbye' last season for example. It's just an easy media line to fuel speculation.
He probably doesn't know what his future holds just as much as we don't at the moment.