Seems like just some gentle nudging sure. But do that at scale and it's certainly more effective than campaigning for a politician. If they did that in the open, then sure. But they don't.
There's no way for any person or organisation to address the entire voting population at once. So according to this guy, any time anyone encourages people to vote via any medium, they're engaging in election manipulation. This is exactly the sort of duff reasoning that finds non-existent conspiracies in every corner.
Reminding people that there’s an election is not taking sides. It’s certainly not an instance of “vote manipulation”. I’m not commenting on the broader issue, just this specific claim, which is bonkers.