Im creating a SaaS myself using Render - need help with custom domains for this sass

Good afternoon, im needing help with getting custom domains for my multi tenant web service on render. Initially I was going to use Cloudflare but it also looks like render uses Cloudflare is there a way I can make this work? Currently the plan was to use cloudflare for saas, but because render is using a cloudflare to handle there domains its seems like I can’t as well because it points back to cloud flare.