Mac mini harddrive problem

I need to put the Container disk1 to Machintosh HD

Can someone give some advice ?

I have no idea what you’re trying to do. Can you explain it a bit better what you’re trying to accomplish?

Thanks for asking. I am trying to add the file space on right to Machintosh HD so that the Mac built in apps have more file space and Mac automatically stores everything to its default file spaces.

I’m not sure you can after the fact, except by reformatting the entire drive and re-installing your OS and apps (or alternatively doing a Time Machine back up and then restoring from that). Try googling it and see if someone has figured out a trick to effectively de-partition a drive.