How can you get the section_id of the section you want to dynamically render using the Section Rendering API. Since the theme app extensions let you create app blocks only, you don’t really know the section where the block will be added and you can’t make use of the name of the block eg. on a section my_custom_section.liquid, we can use my_custom_section as the id in a static section defined in the Section directory of the theme files.