I just formatted my Macbook Pro. Using macOS Catalina 10.15.4
At boot, I pressed Cmd+R to enter recovery. I then used the disk utils to erase the "Machintosh HD - Data" partition.
I then went over to reinstall the OS and when prompted to choose between "Machintosh HD" and "Macintosh HD - Data", I chose "Macintosh HD". That gave me an error, saying basically that nothing could be installed to that partition. I then retried, but this time used the "Macintosh HD - Data" partition. All good, the OS installed and here I am now... just opened up Disk Utils and I see this mess:
What on earth happend? How can I fix this mess? Screenshots of each partition are above.