CI4: create single view (modal / non-modal) for both Add/Edit

as seniors know about i have just started learning using CI4 as recommended by @InsiteFX, so may be the question is worthless. anyway, i am trying following different guides, today i started seeing this Guide , here he created a modal form with method="post" at around 01:50 , so question arise that is there a way i can create a Single View for both methods Add & Edit "post" & "put" ? if so, please have a link to the guide from where i can create a single modal form for both operations.
regards.

edit: because appearance and functionalities are same in both imo. main difference is in Add form should be blank and Insert will call, in Edit form should contain existing data for selected row/record and Update will call. if there are calculations involved, they will work same in both cases etc.

1. I Create 4 layout: default (for list table, consists data tabel, detail btn, edit, and delete), index for list table, headform for reusable form Modal, and show/edit for data detail content.
2. I use "include('layouts/headform')" after delete and Edit button.
3. In headform.php file I use staticBackdrop Form Modal and write "include($detailData) in body. $detailData is declared in the controller as array data of each controller.

So, I can use reusable headform.php to call Form Modal for Add/Detail/Edit in Table List View. And I can re-use it to different data like Task Detail, Employee Detail...and so on.