There's one. It's Signal. I keep telling people to use it and they keep not, because people are less likely to do things if they've been told they should do them.
I think they have different (and somewhat opposing, even) targets, Signal wants to be extremely privacy protecting, and it's a disservice to their goals to sell them as a replacement for WhatsApp, because they're not.
If you want people to switch, recommend Telegram.
Why would people switch from always-end-to-end encrypted group chats to never-end-to-end encrypted group chats?
Boosting Russia is not the solution.
I use Signal to communicate with other tech folks, but good luck convincing your dentist/doctor/etc to send reminders on signal instead of WhatsApp.