Get my cloudflare domian to point to my synology nas wordpress site.

Very new to this. I have a Wordpress site on my synology nas. I created a Cloudflare tunnel and it is working fine. I purchased a cloudflare domain name and want it to show my synology Wordpress site. I thought I had it setup but when I went to the domain I got error 502. Browser working and cloudflare working but host error. I found numerous videos but they are very unclear on what to do after tunnel setup. I have ddns https://****.synology.me:5001.