Here's a Mastodon server that mirrors many Ukraine-related Twitter accounts: https://fed.celp.de/@uanews
(Who knows how long it will keep working, of course.)
(Who knows how long it will keep working, of course.)
It's also not a great list. Igor Sushko, for example, is very susceptible to posting unverified things that later turn out to be false.
A much better list is Noah Smith's at: https://twitter.com/i/lists/1492242776825552896. Yes, you now need to log in to see it, unfortunately.
Public Twitter lists seem like the sort of thing that's quite scrape-able though, even behind a login wall. With sufficient caching & semi-randomised access it should be fairly hard to detect which account is doing the scraping.
I'm not sure why anyone wants "neutrality" to mean 50/50 airtime, instead of attempting to present the best available picture of the world, even if it's not favorable to one side.