How to configure 2 sub domains / CDN on DO DNS = DO Spaces + Google Bucket Storage

Hi I have my domain with DO, i have created two CNAME subdomains within the control panel from the same domain.

1 subdomain is pointing to DO storage with SSL/CDN enabled the other subdomain also has SSL enabled with Lets Encrypt but when i point it to my Google Storage via CNAME i can upload and delete the file/image, but it does not appear when i load it. The error i receive is connection not secure, meaning the SSL isn’t working?

I know i have done this wrong haven’t i?

If i rephrase my problem above, in other words i have 2 sub domains on DO, 1 has CDN enabled with SSL how can i get CDN enabled for the second sub domain which has SSL?

Any help would be appreciated.