Hi there,
I get an XML-RPC error for your site in the Jetpack debugger – it doesn’t appear that XML-RPC is being blocked, but when we try to connect to your server it’s timing out.
Please try completely deleting and reinstalling Jetpack, and then try to reconnect.
If that doesn’t help, try disabling all your plugins except for Jetpack, and switch to a default theme like Twenty Twenty and then try connecting. If it connects, then it’s likely your theme or a plugin that’s causing the problem.