Too large Other Volume in Container
Multiple &quot;Macintosh HD - Data&quot; is a sure sign that Catalina has been installed more than once without erasing the whole physical disk.
You may be able to fix it by:

Backup all your data and settings to Time Machine (in case something goes wrong).
Discover using &quot;diskutil apfs list&quot; which of disk1s5 and disk1s6 is  mounted.
Boot into Recovery mode (reboot holding Cmd-R down).
Using Disk Utility, delete all but one of the multiple Data disks.  Keep only the one which was mounted in step 2.
Reboot as normal.
If this works, all good.  If not use the Second Way below.

Second Way:

Backup all your data and settings to Time Machine - this is essential.
Boot into Recovery mode (reboot holding Cmd-R down).
In Disk Utility make sure you can see all physical disks.  Do this by using the menu View and Show All Devices.
Erase the disk (not the volume) in Disk Utility.
Reinstall macOS.
Use Migration Assistant to recover all your data, apps and settings from Time Machine.

If you are not confident of doing this, take your Mac to a repair shop.
There are numerous examples on the web of people getting into this mess, and getting out of it!  For example: https://discussions.apple.com/thread/250731491