Fedified.com is a list of Twitter-verified accounts that have moved to Mastodon. This is a hand-curated list, so it's updated a few times a day. https://fedified.com/
Fedified — Notable Twitter accounts on the Fediverse

Protecting public figures, journalists, creators, companies, and brands on the fediverse by verifying common ownership of Twitter Verified and Mastodon accounts

Mastodon 🤝 Twitter Verified ➡️ Fedified
@taylorlorenz when I try to click through from the mastodon handles to follow the people it doesn’t work and prompts me to migrate my account (?!) but if I just go back to the main Mastodon instance and search the names I can easily follow them. One solution: make this an exportable CSV file that I could then import and follow many of them with a couple of clicks. Any more detailed guidance as to how to use this list efficiently without having to click many times for each name?
@HelloAndrew That's a Mastodon thing, you can't easily one click follow unless you're on the same instance. Easiest method I've found is to copy their full username and server, then paste that into your search box on your own instance. It's clunky but it works.
@torgospizza that’s what I’ve been doing but it’s incredibly time consuming. I wish someone would make a CSV file out of this it would be so much easier to import that. In any case thanks for your reply!
It doesn’t help that my iPad is on low battery and if you’re plugged into power then typing on an iPad becomes almost impossible.