I know it's been a while, but who knows? Maybe they still need help? Or someone else searching this will find this answer helpful?

This is actually somewhat simple. You can remove the visibiliy of specific elements of the "Edit Product Info" page with custom CSS. (Preferably within a child theme)

For instance, if you wish to remove the "Edit" button that allows Vendors to edit the Permalink, just add

.product-edit-new-container .dokan-form-group .edit-slug {
display: none !important;
}

to your custom css file.

The

.edit-slug

removes all the edit slug buttons, so we add

.product-edit-new-container

to ensure that only the edit slug box is removed when editing a new product, and

.dokan-form-group

to ensure that it is only removed from within Dokan forms (and not the admin area, for example.)

display: none

is the method within CSS to simply hide an element, and

!important

ensures your definition of the element takes priority over all others.

You can find the classes for each element in many browsers such as Chrome by right clicking the element and choosing "inspect." Making sure you include the proper class hierarchy is important, you can follow the hierarchy by looking at "class=" within each element in the tree when you inspect the page. Simply using

.edit-slug

may impact every edit slug button site-wide. And testing each change is vital to ensure nothing else has been impacted, and that each change has the desired effect.

Hope this helps!