Where can I see how much interest I have accumulated on my staking?

Step 1. Go to > Staking 

Step 2: See the details of your open and completed stakings in the lower part of the screen  

Step 3: Go to > View to see the Staking details

Step 4: In > Open Stakings, the interest accumulated on your Fixed Term / Flexible until now will be visible under 'Yield Accrued'. In the Completed Stakings section, you can see interests earned in each staking.