Open modal on button click where modal is in a linked partial

My structure is:

I have a layout which is little more than a menu at this stage (appsecure.ejs)

I then have a view based on that layout (review.ejs)

Within that view i have a partial linked (summation_modal.ejs).
Within this partial is a modal which is to be called from different views as appropriate

So i add a button to the view page (review.ejs) which i want to open the modal located in the partial but it does not show in the dropdown. (It is also unavailable in the picker to open using a click event.)

Should it show or is this a bug / missing feature?
or
Am I expecting too much and i have to add it’s name manually in code view (which works)?