Starting from the 17th of August 2022 you will be able to preview your old Terra NFTs that are migrating on Polygon.
This is a step that allow you to see which NFTs are eligible for the migration.
All you have to do is to hold your NFTs on your wallet and be sure you have selected the Terra Classic chain, or you will not be able to see them in the OnePlanet preview.
In case you can’t see them, you are likely in the wrong chain or you still have your NFTs listed on old marketplaces, so be sure all of them are delisted and that they are in your wallet before trying to use the preview feature.
If you see one or both groups, Arkadia: OGs and Arkadia: Edibles OG, then you are good with the migration of our project.