You can bring any Co-Producer sample into Arcade two ways, and they behave differently once you do.
Send a sample to Arcade
Open a sample's context menu (three dots) and click Play in Arcade.
This option is grayed out for some partner libraries. If it's unavailable, use the drag and drop method instead
Open Arcade (2.13 or later)
Go to Your Stuff, then the Co-Producer tab, where the sample is waiting
If the sample isn't showing up automatically, click the refresh icon next to the sample count
If the sample is from one of Output's own Arcade lines, this method also gives you a direct path to its original kit: click Download Kit, or Open Kit if you've already downloaded it.
Drag and drop a sample into Arcade
Drag a sample directly from Co-Producer into Arcade. It lands under Your Stuff > Local Samples and is treated like any imported audio, whether it's an Output sample or a partner sample. Use this method for any sample where Play in Arcade isn't available.
Ways to use your sample in Arcade
Once your sample is in Arcade, you can:
Generate a Sampler from it with Sampler Generator
Add it to a new or existing custom Sampler with Custom Kits in Arcade