I am entirely new to this and not sure it is even a good idea.
I noticed you can use the “public folders” to host static websites pCloud
I have my domains at Cloudflare, so thought it easy to test just a cname recorded with the shared link from cloudflare filedn.eu/lgofgtsok9hffafw91ghkcr/test/
It doesn’t work, but I don’t know anything.
I am just an idiot with a little knowledge
You need to see if Filedn have an option to add a custom domain. I don’t believe they have, but I only checked for a minute.
If they have such an option, you need to follow their procedure to add a custom domain. As part of that procedure, they would tell you what DNS records you need to add in Cloudflare.
If they don’t have this option, you can’t do this with Cloudflare.