Question about operating nonprofit over state lines

Hey friends! I started a 501(c)(3) a few years ago and I am looking to start a new one in the coming months. My old NPO only operated in my home state; however, with this new idea, I would like to work across the US. To be broad, I would be doing advocacy work, fundraising, and selling items in multiple states.

With this in mind, would I have to register my nonprofit with EVERY state I intend to do work in? Or can I just file for my home state? I don't want to make any legal goof-ups.

For example, can a nonprofit like Feed My Starving Children sell items through their marketplace (https://www.fmscmarketplace.org) to anyone, regardless if they are only registered in one state? (I'm not sure if they're registered in multiple states, but that's the best example I could think of.)

Thanks in advance!

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