I am wanting to add a visualforce page onto a salesforce community but I don't have the visualforce page component in experience builder. I can not find anything in the documentation that explains why it's missing?
Have you ensured the checkbox " Available for Lightning Experience, Lightning Communities, and the mobile app" is checked on the VF page?
Despite this, if you are still unable to see the Visualforce component in the content section of the builder, please log a case with salesforce support asking to enable the permission "VisualForce Support in Communities"
-Regards, Salesforce Support