Description
Due to a problem in Intel® Quartus® Prime Pro Edition Software version 20.2, if you assign '0' or '1' directly to an Intel Agilex® 7 Devices GPIO output pin will always output a '1' (high).
However, connecting a register output to the Intel Agilex® 7 Devices GPIO output pin will work properly.
Resolution
The issue has been fixed in Intel® Quartus® Prime Pro Edition Software version 21.1 and later.