What would you expect?
The tor network has more common stuff, drugs etc.
I2p meanwhile is just really good for anonymity. I think using it for messengers is the best use. I was able to find a bunch of stuff, and yes unlike the dark web this would mostly be also there on the clearnet, mainly because there is no such business on i2p I guess
Just random people offering services for free, a few pads, pastebins, fileservers
You can find quite some cool stuff actually, but I think the main advantage is using it for messaging
And unlike i2p, i2pd also doesnt really use much battery? I could totally keep that on all day
If you want to host stuff, you probably want Termux. It is its own distribution but you may want to run a Debian proot inside Termux, which will have way more software and maybe also more reliably and fast security updates (heard that was a problem in Termux)