This isn’t due to Meteor Slides itself. The markup for the slideshows is generic, nothing that an adblocker would see as an ad rather than content.
If your slideshow is getting blocked, it is because of the content in that slideshow. Adblockers have different lists, but they are looking for words like “ad”, “leaderboard”, etc. If your slide images file names, or the slide post titles, or the slideshow itself use these terms, the blocker will think it’s an ad.
So check your content and change any terminology related to ads, and it should appear as content to the adblocker, as long as it hasn’t been flagged as an ad by the user.