Looks like this "Citizen Code of Conduct" is only a template for creating rules, but is good to follow these rules on the whole internet (and in real world too).
Talking about the rule you mencionated, that rule is only for non-NSFW communities. You can make your community only if you mark the NSFW flag in it and all posts flagged with it as well.
If you do not understand something feel free to ask and sorry for my bad english :-)
Apparently, that's not a logo, it's a badge.
Idk where exactly this came from, but I found an ebay seller with an almost identical product: https://www.ebay.com/itm/262732333154
I'll try to find more information later because it's really hard to find something about it and I'm really busy right now.
Whoa, these little boards are powerful!
Shame that it's hard to find and when i find one it's very expensive :(
It's closed source. But the dev said that maybe in the future it can be open sourced.
I think a good one is unciv, a civilization V port to android. It's open source too! Here is the link to f-droid: https://www.f-droid.org/packages/com.unciv.app/
Sometimes it's just a visual glitch.
In the next time try to click in send and wait 2 to 3 minutes, then check the community (or click to see your posts in your account page) to see if the post is there.
Well, it is listed at https://lemmy.world/instances so it should work.
Maybe the servers were slow at the time you tried?