I see a generic "trending 24h" timeline but don't see anywhere to login with my pubkey
Discussion
You can’t login via mobile yet AFAIK.
I use it on iOS Safari. I use the Nostore NIP-07 signing extension
Can you explain this?
How do use Nostore in safari?
I hardly ever use safari so haven’t tried. Orion browser doesn’t seem to work with Alby now (and nos2x extension is broken with that browser too) so options are limited.
It’s a little weird to setup but once it’s setup it just automatically asks permission to sign whenever you’re on a Nostr site. Install the Nostore app from the App Store. When you open the app it has instructions for iPhone, iPad, macOS. Here are the instructions for iOS: 
Samesies.