Do keep in mind that Yandex falls under Russian federal law. There was an incident already with FSB getting data about backers of Navalny's anti-corruption website from Yandex Money and if you are vocal on LGBT laws you can easily run afoul of federal children protection law (to protect children from abuse, shocking materials, LGBT, anti-family values, etc.) like the founder of Deti-404 (LGBT support group that even the author of children protection law defended, ironically enough) did.
I'm personally considering hushmail (Canadian) or some other paid email in the future, for maximum piece of mind, any double digit number seems reasonable enough annually. Some out of the way liberal first world country , no superpower (and superspy) aspirations, a small paid provider (that actually needs customers and word of mouth and not throwing their weight around, Google is notorious for deleting YT channels willy nilly for 'guidelines violation' and then restoring them after a shit storm) to ensure no 'smart' 'ML' algorithm bans you. Sounds just about right.
I never saw/heard of evidence of such behavior.
> but you'll still lose your emails if they decide to suspend you
Emails are easily backupable, you can download them locally and/or forward everything to the "backup" email. One more service to host email on your own domain is Yandex.Mail, it's free and pretty good.