Viki for this device states in this image:
I see the two descriptions for the pins: one colored label and another greyed label.
From my experience with this device, I know that the PC0 and PB14 are pins for I2C3. I got this information from MX view for this device under Stm32CubeIDE:
Any other I2C connectivity doesn’t match the same views from MX.
Greyed rows don’t have such pin-label combinations in the above image.
So I have a question. Is it possible to have I2C more than I2C3 on this board?