After dealing with Yue Yao, Miao Yi went back to resting. He was not concerned with the battles of the others. After all, he held no sway over the rules of the Subjugation Crusade. Those that needed to die would still perish regardless. His sympathy and compassion wouldn't make any difference to the end result. Sometimes, it was better to just ignore some matters and save yourself from getting negative feelings about them.
As for the Geotranscendence Bangles he looted last night, Miao Yi wasn't planning on handing them over to Yue Yao for the time being. He was afraid that some kind of mishap would occur to her if he handed them over now.
That same night, after the day's battles were over, Miao Yi and the others returned to the Celestial Nation's mountain for a while. Then once they excused themselves, they snuck back to the foul smelling, blood-drenched battle arena.
