Hello kostya572,
Thanks for using the Apple Support Communities!
I see from your post that you want to do a clean install of macOS Catalina on your Mac but you see multiple listings for "Macintosh HD" and are not sure how to proceed and you want to make sure this is displaying correctly.
The article, About the read-only system volume in macOS Catalina explains in detail about how these volume are used on your Mac in macOS Catalina.
If you wish to perform a clean install of macOS, you'll need to follow the steps in these articles:
How to reinstall macOS from macOS Recovery
How to erase a disk for Mac
I hope this information helps you.
Cheers.