The setup: We need to transfer in domains from other hosting platforms into Cloudflare, however the name servers at the current provider point to Netlify which we use to host the website, these websites are live. As the only way to transfer into Cloudflare domains is by changing the name servers on the existing provider how can we do that and still maintain the site being delivered by Netlify?
If you do not want to change nameservers at all, our Business and Enterprise plans offer CNAME setups which allow you to proxy via Cloudflare using CNAME records from your existing nameservers: Partial (CNAME) setup · Cloudflare DNS docs
I cannot personally say I’ve used Netlify, but they do provide their own integration here it seems which you may find useful: Cloudflare | Netlify Integrations