disk utility - Unable to shrink MacOS partition

I’m unable to shrink my macOS quantity/disk on my Intel 2019 15″ MBP with a 1Tb disk to create space (128gb) for putting in a linux distro in twin boot configuration.

Disk utility in macOS is not going to let me change something in relation to disk measurement and it seems my macOS set up is already taking over the complete quantity of house within the drive.

I had beforehand used Bootcamp to put in home windows 10/11 in a twin boot config, however i subsequently eliminated home windows utilizing Bootcamp and reclaimed the house.

I’ve disabled File Vault and likewise ran FirstAid on my disk and it stories no errors.

Inside Disk Utility I see this message in relation to my disk:

This container has 373.14 GB used house. Its minimal measurement is 1 TB.
Snapshot tidemarks can increase the minimal measurement above the used measurement.
This container can’t be break up as a result of the ensuing containers would
be too small.

If I maintain down command somewhat circle seems on the high of the road proven within the display screen shot under, and I ought to have the ability to drag this to vary the scale of my disk however nothing occurs when i do.

I’ve tried holding command at boot and utilizing disk utility outdoors of macOS however i get the identical factor.

As you may see from the display screen shot I’m utilizing lower than 400gb of a 1tb disk so I feel I ought to have the ability to shrink the disk by 128gb with none probs.

I additionally tried resizing my macOS set up partition utilizing the Debian 12 installer however that errored out saying it was unable to change the disk.

I believed I’d see if I may use bootcamp to recreate a partition for a home windows set up after which use that for linux, however when i attempt to run bootcamp I get: