Summary
I couldn't find any specific English audio track downloads on the topic of the Battle for Sevastopol from 2021. However, I can suggest some alternatives: Review — Battle for Sevastopol (2021 Portable, English
While many versions available on platforms like Google Play are only in the original Russian, several major streaming services do host the English dubbed version: Review — Battle for Sevastopol (2021 Portable, English
Because different video rips have varying framerates or cut scenes, you might experience audio drift. The 2021 portable track was synchronised to the most common 23.976 fps Blu-ray release. If the audio drifts: Review — Battle for Sevastopol (2021 Portable, English