Adding Custom fields on a page

[ShafanHameed]

Hi i am developing a website using Vituemart and vm Vendor plugins. In which i have a page to add product for my vendors. I am trying to add some custom fields in that page but it only shows fields as text fields. How can i show image upload and plugin options in that page's add product form ?

I am using
Joomla version 3.9.20
VirtueMart 3.8.4 10335
Chrome Version 95.0.4638.54
Php Version 7.3