I’m not sure why you are having problems with HTTPS on your Apple Watch.
What exactly was the error message you saw?
Yes, TLS support on our servers is exactly as shown there. TLS 1.0 and older are not supported, because they are no longer considered to be secure, and keeping them enabled provides opportunity to downgrade and attack connections.
Again, it would help if you could be a bit more specific.
If you’re trying to host an API on your site with us, you may be running into this issue:
If you’re trying to access an API hosted elsewhere, then any CORS issue is caused by restrictions on the side of the API provider.
We have integrations with different SSL providers. However, these issues are rarely caused by the choice of SSL providers. You’re free to bring your own certificate if you want, but I don’t think it will solve anything.