Honestly, that's not as unusual as it feels. Bing's IndexNow is a game-changer for smaller or newer sites - gets you visible way faster than Google's usual crawl schedule. and yeah, DuckDuckGo is basically Bing under the hood, so seeing them both show up together makes total sense.
google takes its sweet time. You can be indexed but still invisible - a few posts, a new domain, limited authority.. google doesn't hand out traffic just because you exist.
I'd pause before reading too much into that 60/40 split. First question: are your pages actually indexed in Google Search Console? Are you getting impressions, or just a green tick? Second: what keywords are you chasing? If they're competitive, a new site hasn't got a prayer yet.
Also, a quick reality check - if your total search traffic is still tiny, those percentages look dramatic but mean very little. Early SEO data is always noisy. Give it a few months and see if the pattern holds.