Refer to the Knowledge Base below and connect the target pins to GND.
How should I connect VCCIO3B and VREFB3BN0 pins in 10CX085 U84 package?
https://www.intel.co.jp/content/www/jp/ja/programmable/support/support- resources/knowledge-base/component/2018/how-should-i-connect-vccio3b-and-vrefb3bn0-pin-in-10cx085-u84-pa.html
--------------------
Category:Quartus® Prime
Tools:Quartus® Prime
Device:Cyclone® 10 GX