Website is being blocked from Google

I just connected a website to Cloudflare and it is being blocked from Google index in GSC (Indexing request rejected) and showing as NOT mobile-friendly in Google’s test. On the contrary it shows as mobile-friendly in Bing’s webmaster tools. No idea why this is happenins. WordPress setup is OK, SEO plugin is OK, robots.txt is OK, htaccess is OK. I’m thinking it might be something with DNS. Please advise.

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