Success Criterion 3.2.6 talks about how someone with disabilities can reach out to get help should they have any issues when using your website. It also indicates that the method chosen to provide help for users is in the same location when moving through the website so the user can reach out easily should they need help. Do also note that this Success Criterion does not cover tutorials, help icons/text and videos explaining how things work.
An easy way to achieve this goal is to have a dedicated page providing a way to contact the business such as a phone number or email address. It is not required to respond immediately as long as you are indicating the hours of operation. I do know that some website owners prefer not to add their contact details due to spam. An alternative method would be a contact form, chatbots or even linking a social media channel if that is the preferred way you would like to be reached if someone needs assistance.
If you cannot support providing assistance alternative options would be a comprehensive FAQ, Support portal or a fully automated chatbot. I would recommend the earlier options though as having someone to reach out to does help you better understand any issues that happen on the website and potentially plan to improve these sections.