Interesting. I'm on lemmy.ml using Jeroba, when I go into the Canberra community in the app I can only see one post and one comment (my own), but when I look at the website there's four other comments. Any idea why that is? Is this the fault of the app? Or does it come down to the federated nature of Lemmy?
Mine is having the same issue. I checked with some other communities and it didn't seem to have that error. Can you check another instance and see if it's the same?
I'm on lemmy.ml as well, having issues with community discovery for a couple of the communities here (primarily ausfinance). Maybe federation is having issues due to the server load?
If it's the first time searched from your instance, it takes time to find. Couple that with the server load makes it even longer.
Search using the search function and put in a community like !australianpolitics@aussie.zone, the whole url, and wait till it appears. You can go back to search and search it again after doing something else.