Applicability of A.10.1 Cryptographic Controls

If you are referring to SSL certificates, then control A.10.1.1 Policy on the use of cryptographic controls is probably applicable to you, while control A.10.1.2 Key management may not be applicable because you are not handling keys. 

But you primarily need to assess your risks, and analyze requirements to define which controls are applicable and which not. 

Here are a couple of helpful articles:

• How to use the cryptography according to ISO 27001 control A.10 https://advisera.com/27001academy/how-to-use-the-cryptography-according-to-iso-27001/
• The basic logic of ISO 27001: How does information security work? https://advisera.com/27001academy/knowledgebase/the-basic-logic-of-iso-27001-how-does-information-security-work/