Hey there 👋 - You can see public community federations available to join in the app by tapping the menu at the top left of the Community screen > Add community > View public communities.

Bitcoinmints and Awesome Fedimint are other resources that list publicly known Fedimint federations and Cashu mints: 
1. github.com/fedimint/awesome-fedimint
2. bitcoinmints.com/?tab=mints

Kindly note that Fedi does not endorse any of the mints listed on either the Awesome Fedimint list or on the Bitcoinmints site 

Lastly, we have a support article that may be helpful 🚀 
support.fedi.xyz/hc/en-us/articles/20216056100242-Where-can-I-find-public-federations-to-join 

 Thanks!