How many amps are you getting? And what is your total voltage? If the connected voltage (at the LED boards or strips) is more than the driver can supply, this will limit the current to whatever the LEDs can draw at that particular voltage.
For example, you have three QB288s in series hooked to the above driver. The driver supplies 143V max. 143V divided by 3 is 47.67V. But at 47.7V, each board draws 1400mA - so your 1750mA driver cannot supply any more than 1400mA because it is voltage limited. Turning up the Io adjustment will not make it go higher.
I used this table for reference:
https://horticulturelightinggroup.com/collections/quantum-boards/products/qb288-v2-quantum-board