Why I cannot get indexed on Google but it works well on Bing (Vercel/NextJS)?

I have recently launched a new website using Vercel and NextJS and am trying to get it indexed on Google using Google Search console. The Bing console worked like a charm however I cannot get it indexed on Google.

When I hit "request indexing" it returns "Indexing request rejected" enter image description here

Same for the sitemap, google doesn’t want to fetch it enter image description here

My robot.txt

User-agent: * Allow: / 

My HTTP headers

% curl -I http://estimationfrancaise.fr/  HTTP/1.1 308 Permanent Redirect Date: Tue, 21 Sep 2021 07:02:49 GMT Content-Type: text/plain Connection: keep-alive Location: https://estimationfrancaise.fr/ Refresh: 0;url=https://estimationfrancaise.fr/ server: Vercel x-vercel-id: cdg1::f22rp-1632207769716-975691dae8e5