Excel : WOPI HOST Task pane add in not showing

[dhaivat-cloud]

Hi,

I have a project in Angular, that is my project for my UI and i have created another project which is done with Yeoman office generator, and I am using react and typescript for the same.

I have tested my taskpane add-in on my local environment with my ms excel on my desktop it seems to be working fine.

Now i am trying to run the same with my wopi host, my wopi host is loading the excel in an iFrame, for the same they are making the request using Access Token and getting the excel to load, but in that i am unable to have any function for any sort of Add-in.

I want to add my own Taskpane Add in onto the iframe that is loading my excel sheet, with the WOPI host.

Please help me with the above. Thanking in advance.

Thank you