Did cloudflare change TOS for using flex or jellyfin throught the tunnel?

I heard that cloudflare free version changed the TOS to allow the use of flex or jellyfin through the tunnel of that, is that correct?

No, you can’t use the CDN for media that isn’t stored in Cloudflare or as a part of an enterprise contract. You might be able to use the tunnel unproxied but can’t say for sure.