There is, I think.
I would say that you already have labelling of political ads. The way the Canada Elections Act framework works when we're regulating speech during elections is that parties have to take accountability for the ads they put in place by indicating that they've been approved by the agent of the party. Third parties that are operating within the law also have to disclose who's behind the advertisement, and they have to subject themselves to limits. The way you do that is to make the broadcasters and platforms comply with certain restrictions when labelled content is put out, with the requirement not to post unlabelled content that is an election advertisement. You could extend that part of it, I think, relatively easily.
The second thing you can do is pass legislation that would similarly prohibit the platforms and networks from disseminating information that looks like election advertising by third parties, even if it is produced by agents rather than by humans.