@eraroma
If you put this in your theme/child theme style.css file, it should keep them visible at all times:

div.row-actions.row-actions-product, .wcv-grid table .row-actions {
    filter: alpha(opacity=1)!important;
    opacity: 1!important;
}

@eraroma
If you are having vendors add products in two different languages….
Essentially you need to choose one language for your site at this time for the WC Vendors functions to work properly- especially with the dashboard pages.
I know we discussed this with you in the recent past:
https://www.wcvendors.com/help/topic/wpml-issue/
https://www.wcvendors.com/help/topic/how-i-can-duplicate-the-products-in-two-different-languages/
Translating from RTL for one language is one thing; translating to TWO languages, and one using LTR and one using RTL is going to mess up the dashboard pages.

I do not know what would change with the mobile styling– does your theme use @media queries to style for mobile?
If so, perhaps you need to add the above css to that section also– look for the mobile styles in the css and see if it overrides the screen sizes for the rest of the css styling.
Otherwise, that is the only css that causes the links to be hover only, so I do not know why they are not showing in your situation.
You may also have to change the positioning if your theme is causing the links to still show far to one side when viewed in mobile format/size.