Question regarding DNP-DS620 printer setting in command line on Linux Ubuntu, able to expand print size width

Hello Miss, Sir,
I contact you because my company would like to be able to change the 
width of the size of the prints on the DP-DS620 printer on Linux Ubuntu.
We know that DNP company Hotfolder application on Windows and Mac works 
and allows printing with wider widths than the basic formats offered by 
the printer, we would like to be able to do the same on Linux Ubuntu 
version 20.04LTS from the command line.
You can find the Hotfolder app on their website: 
http://dnpphoto.com/en-us/Utility-Apps.
Currently we are using a gutenprint 5.3.3 driver for the DNP-DS620. Here 
are the available options:

PageSize/Media Size: B7 w288h432 w288h432-div2 w324h432 w360h360 
w360h504 w360h504-div2 w360h504-w360h360_w360h144 w432h432 *w432h576 
w432h576-w432h432_w432h144 w432h576-div4 w432h576-div2 w432h648 
w432h648-div2
ColorModel/Color Model: Gray Black *RGB CMY CMYK KCMY
StpColorPrecision/Color Precision: *Normal Best
Resolution/Resolution: *300dpi 300x600dpi
StpiShrinkOutput/Shrink Page If Necessary to Fit Borders: *Shrink Crop 
Expand
StpLaminate/Overcoat Pattern: *Glossy Matte MatteFine MatteLuster
StpNoCutWaste/No Cut-Paper Waste: *False True
StpColorCorrection/Color Correction: *None Accurate Bright Hue 
Uncorrected Desaturated Threshold Density Raw Predithered
StpBrightness/Brightness: 0 100 200 300 400 500 600 700 800 900 *None 
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 Custom.REAL
StpFineBrightness/Brightness Fine Adjustment: *None 0 5 10 15 20 25 30 
35 40 45 50 55 60 65 70 75 80 85 90 95
StpContrast/Contrast: 0 100 200 300 400 500 600 700 800 900 *None 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 Custom.REAL
StpFineContrast/Contrast Fine Adjustment: *None 0 5 10 15 20 25 30 35 40 
45 50 55 60 65 70 75 80 85 90 95
StpSaturation/Saturation: 0 100 200 300 400 500 600 700 800 900 *None 
1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 
2500 2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 
3900 4000 4100 4200 4300 4400 4500 4600 4700 4800 4900 5000 5100 5200 
5300 5400 5500 5600 5700 5800 5900 6000 6100 6200 6300 6400 6500 6600 
6700 6800 6900 7000 7100 7200 7300 7400 7500 7600 7700 7800 7900 8000 
8100 8200 8300 8400 8500 8600 8700 8800 8900 9000 Custom.REAL
StpFineSaturation/Saturation Fine Adjustment: *None 0 5 10 15 20 25 30 
35 40 45 50 55 60 65 70 75 80 85 90 95
StpImageType/Image Type: None Text Graphics *TextGraphics Photo LineArt
StpGamma/Composite Gamma: 100 200 300 400 500 600 700 800 900 1000 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 *None Custom.REAL
StpFineGamma/Composite Gamma Fine Adjustment: *None 0 5 10 15 20 25 30 
35 40 45 50 55 60 65 70 75 80 85 90 95
StpCyanGamma/Cyan: 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 
1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 2600 
2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 4000 
*None Custom.REAL
StpFineCyanGamma/Cyan Fine Adjustment: *None 0 5 10 15 20 25 30 35 40 45 
50 55 60 65 70 75 80 85 90 95
StpMagentaGamma/Magenta: 0 100 200 300 400 500 600 700 800 900 1000 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 *None Custom.REAL
StpFineMagentaGamma/Magenta Fine Adjustment: *None 0 5 10 15 20 25 30 35 
40 45 50 55 60 65 70 75 80 85 90 95
StpYellowGamma/Yellow: 0 100 200 300 400 500 600 700 800 900 1000 1100 
1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 2400 2500 
2600 2700 2800 2900 3000 3100 3200 3300 3400 3500 3600 3700 3800 3900 
4000 *None Custom.REAL
StpFineYellowGamma/Yellow Fine Adjustment: *None 0 5 10 15 20 25 30 35 
40 45 50 55 60 65 70 75 80 85 90 95
StpCyanBalance/Cyan Balance: 0 100 200 300 400 500 600 700 800 900 1000 
*None Custom.REAL
StpFineCyanBalance/Cyan Balance Fine Adjustment: *None 0 5 10 15 20 25 
30 35 40 45 50 55 60 65 70 75 80 85 90 95
StpMagentaBalance/Magenta Balance: 0 100 200 300 400 500 600 700 800 900 
1000 *None Custom.REAL
StpFineMagentaBalance/Magenta Balance Fine Adjustment: *None 0 5 10 15 
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
StpYellowBalance/Yellow Balance: 0 100 200 300 400 500 600 700 800 900 
1000 *None Custom.REAL
StpFineYellowBalance/Yellow Balance Fine Adjustment: *None 0 5 10 15 20 
25 30 35 40 45 50 55 60 65 70 75 80 85 90 95
StpLinearContrast/Linear Contrast Adjustment: *False True

We thank you in advance for any help.

Antoine Birkhofer
Developer at Emc2Studio