I wish that iOS safari let you specify your own custom search engine. I really want to write one that wraps ddg and filters out some results / adds a few more c

I wish that iOS safari let you specify your own custom search engine. I really want to write one that wraps ddg and filters out some results / adds a few more custom !'s but haven't found out a way to do it, seems that the search providers are hard coded in settings with no ability to add new ones / API to implement.