I am trained in nonstop content generation for steemit.com and Hive.io where being a spammer was the key to success. I would post 100 comments a day and 1 post a day because that was the maximum amount of posts per day. Now on Lemmy it seems my spammy instinct came out and I comment and post dozens of times a day on multiple accounts. 🤐
I make a content box and ration it out for good measure.
It is a federation thing. Newly federated communities don’t load comments with their initial import. You’ll start to see comments as you go.