Yes, you can! The only thing you need to do is to inform your Customer Success Manager about your request.
We can import your old campaigns to our platform if the following conditions are met:
Campaign shouldn't have more than 50 ad sets or ads
The campaign should be using 'Daily Budget' if you want to use Marvin.
Note that, you shouldn't take any action from Ads Manager after you imported the campaign to Adphorus once.