ERPNext - Form Tour - how to add a step to highlight the "Add row" button

Hello, I am looking to add a step to a Form Tour that highlights the “Add Row” button visible below a grid.

I configured my step in UI Tour and specified the element selector that the console returns to me with the document.querySelector(‘.btn.btn-xs.btn-secondary.grid-add-row’) function.

Looks like the Form Tour is passing this stage.

If I want to highlight “Offset X” by one step it doesn’t work either.

Can you tell me how to configure a For Tour step to access a button in a grid, access a column in this grid and access information in a form such as “Offset X”?

Regards,

Mickael