Some of my customers cannot view my site, because of that two-months-old problem with expired LetsEncrypt trust on old devices. As I cannot force all of my visitors update in batch, I would like to change the CA to something else.
here I found some reply that Cloudflare randomly assigns either LetsEncrypt or DigiCert or whatever, but it doesn’t say how to change one. Same as author of that topic, I see other sites on Cloudflare using non-LE certificates and having no problem on old device, and it is a bit frustrating. Is there a way to force the change to another certificate? Is it possible on free tier?