I have 3 skins:

• intranet skin have 1 view parameter for "search-default" of search service
• intranet-search have 4 view parameters for "search-default" of search service
• intranet-cards has no view parameters for "search-default" of search service

Go to intranet-search site in BO and open the service's parameters of general search service.
The 4 services view parameters are visible.

Go to intranet site in BO and open the service's parameters of general search service.
The 4 services view parameters of intranet-search's skin are visibles

Same for "intranet-cards" site

Open service parameters in a new browser => same issue
Clean all the caches => same issue

Can be reproduce on demo nightly