Going by comments in the post, the required login is coming in waves, so not all people may notice immediately.
Still, as Reddit is strong-arming its way across, maybe worth signaling to people there that the fediverse may be used without an account, so long as there’s even one instance that implements logged-out view as the protocol allows it?
I don’t have access to my account any longer, possibly VPN ban, though I never tried to recover it so I can only guess why mine is lost, else I’d post myself.
AFAIK the key to discovery of content you want in Mastodon is to follow specific hashtags, then follow any accounts that you find interesting from there. There are definitely major network effects on Mastodon. Maybe check #news to see if it might be a good starting point for you.