So, Did Time Pass for the people 'banished to the Non-Existence in The Blip'?

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To sorta SPOIL "AVENGERS: INFINITY WAR" for you (in case you still want to see it but still haven't), Thanos manages to get all the Infinity Stones into his Infinity Gauntlet & 'snaps' his fingers (causing half of all life in the universe to vanish). To sorta SPOIL it even more, The Avengers manage to 'reverse The Snap' in AVENGERS: ENDGAME---bringing all the formerly-dissolved people back to the world. They call 'the period during which they were gone' "The Blip." (I first heard it called 'The Snap' because it was begun & ended by people snapping their fingers (while wearing Infinity Stone bedazzled gloves); but--although Feige-or-somebody wanted to call it "The Decimation"--the series (WandaVision, FALCON AND THE WINTER SOLDIER, etc.) call it 'The Blip'). But I kinda focus on the recent Spider-Man: he was in high-school when The Snap 'decimated' him and most of his high-school friends ... did they just go back to the grade they were in when they 'Blipped out'? or did they spend time learning in their non-existence? How do you imagine that worked out? https://marvelcinematicuniverse.fandom.com/wiki/Blip