There are a few probs with qwant unfortunately and I assume ecosia might be the same. It isn't available in all countries so it's sometimes blocked when I am on a VPN. The performance is shocking on the other side of the world. Terrible latency. Often fails completely to return results. Then the search results aren't really good enough either. Tends to return a lot of links from similar sources like it doesn't have much of an index. Its ok for really simple mainstream searches but I regularly need to fall back to no AI ddg or udm14 google.
Unless I want a clanker response. Actually I never want a clanker response but web indexing has become so poor in the pursuit of ad revenue then AI that sometimes it's hard to get anything useful out of search queries these days. It's very frustrating.