Safari on iPhone and iPad only supports the search engines Apple includes in the system settings. If Queye is not there, Safari cannot make it your true default search engine.

1. Open the Settings app.
2. Go to Apps > Safari.
3. Tap Search Engine and check the list.
4. If Queye is not available, open https://queye.co/ in Safari.
5. Tap Share, then Add to Home Screen for the fastest fallback.