Sure some are fakes, but Russians have confirmed some of them dead also.
The most famous fake is major general gerasimov, who was variously reported fired, killed, wounded, many many times.
He’s still alive and they only figured out half these stories were fake when putin personally gave him an award...
https://min.news/en/military/2b63c6584bcb46b3381f443d42d5650e.html
Here is a list of 11 Russian generals claimed to be killed in Ukraine.
https://en.m.wikipedia.org/wiki/List_of_Russian_generals_killed_during_the_2022_invasion_of_Ukraine
Please pick any of these and show how they’re still alive.