I noticed a lot of communities or posts are missing when I view them from my lemmy.ca account vs. the piefed.ca one.
An example would be the [email protected] community.
I can only see around 5 posts from my Piefed.ca account while my Lemmy.ca can see what seems to be all of them.
Here from lemmy.ca and kind of the first time I heard of PieFed. Seems pretty cool!