Sorry you have to see her each day at work - that's not ideal.
There are going to be folks who are sympathetic and supportive of you and others who take your W's side. You just need to block out the awkwardness and keep your head up high.
Me:39 Ex-W:37 M:7 T: 9 S:6 D:3 BD/IHS/Confirm EA/PA: Feb '20 OM1 affair ends: May '20 W/OM2 & moves out: June-July '20 W files for D: Jul20 OM2 confirmed: 9/2020 Divorced: May '21