This is on the roadmap still but don’t have an ETA currently.
You can vote for this feature here: https://support.powtoon.com/en/article/request-copying-slides-from-one-powtoon-to-another-within-the-same-accountbrea commented
I need to send my powtoon with my teacher but I can't because i don't have a business or pro plan and I can't get one because I can't buy it! I'm only eleven!!!