Logitech G HUB allows you to set DPI in increments of 1, but is the DPI actually set to the configured number? Let's find out!
I used the Logitech G PRO with the HERO 16K sensor on my mouse testing machine for this, and as it is extremely accurate it should be easy to see if the small increments actually affects the DPI.
I configured the machine to move 4 inches, and started with the mouse at 400 DPI. Then increased to 401, 405, 410 and so on. The result is pretty clear:
DPI Counts @ 4 inch
400 1653
401 1651
405 1650.5
410 1651.25
424 1651
425 1857
474 1857
475 2063
So NO, the small increments does not work. The DPI is rounded to the nearest 50 (down from x01-x24 and x51-x74, up from x25-x49 and x75-x99).
So just set it to the nearest 50 to your preference so you know for sure what DPI is actually applied.