You being able to "see" other nodes doesn't mean messages can reach them. Nor does it mean they're set up to ACK any messages.
Meshtastic
A community to discuss Meshtastic (https://meshtastic.org/docs/introduction)
Does that mean there isn’t anyone on channel 0 and they on other channels?
Maybe. IDK. Try rebroadcasting and seeing who's out there. The app keeps nodes around for a while, even if they haven't been heard from.
How do I make sure I am setup to receive messages on the default channel? I figured that would be enabled by default.
It is
Great. Thank you for your help! I’ll just wait I guess.
What kind of location are you/the node in? Are you inside or outside? Outside can make a huge difference, or even just being near a window helps.
Next to a window. In a big city, so I see dozens of nodes at this point, still the same waiting to be acknowledged.
Maybe I’ll go for a walk with it.
You seeing another node means you received at least one packet from it. It doesn't mean it'll hear your packets when you're sending them.
I suggest buying two nodes just to play with sending back and forth so you can get a feel for what it looks like when it works. I'm still looking to put an antenna on my roof, but even without it, I can detect nodes miles away, but I rarely make any real contact.
Good to know, thank you!