1) You can open a support ticket with your hosting provider.
2) You can leverage a third party scanning tool via the web.
Below are three such sites that the community deems reputable and trustworthy. You simply enter your website and it will let you know:
3) You can run a scanning tool locally on your server. One such tool is:https://github.com/n8whnp/ssltest-stls/blob/master/ssltest-stls.py