My flush handle broke, I cannot find the flush handle replacement to fit , tried to contact Home Depot but online did not find the correct flush handle

Do you know what brand of toilet you have? There are several versions of flush handles. Some are on the side or the tank and others are on the front corner. Take your broken one to Home Depot, ACE Hardware or Lowe's and they will match the old one for you.

Glacier Bay is Home Depot. I would go there first.

I just bought one yesterday in Home Depot. To my surprise, they had quite good selection of toilet tank handles.

Milo