Earlier this week Portland Thorns, who Riley previously managed, announced general manager Gavin Wilkinson had been placed on administrative leave.
The Thorns previously apologised for their lack of transparency after receiving a complaint about Riley in 2015.
The NWSL, US Soccer and world football governing body Fifa are to conduct separate investigations into the allegations.
Displays of unity were shown in games between Arsenal and Everton, Brighton and Tottenham, Reading and Aston Villa, and West Ham and Birmingham.
While Chelsea’s squad and coaching team joined arms before kick-off on Sunday, Leicester opted to applaud the gesture.
“We know that the FA are planning something on a bigger stage and we just thought it’d be more appropriate to show more solidarity on the biggest stage where it’s more powerful,” said Foxes boss Jonathan Morgan.