It sounds like this would be a case for a grouping of conditionals built within your Repeater field. This is used for: selects, checkboxes, booleans, and radio buttons.
Just like you mentioned, you’d have a radio button or dropdown that would select the category of product at the top, which would then cause certain options to be available for you.
You’d do this within your repeater & have your first option (radio/dropdown/etc.) And then list additional fields underneath almost as if you would want them ALL appearing. The only difference is that you then set rules for them under the ‘conditional’. “Show if _____”, etc. Otherwise, it won’t show as an option to pick anything from.
Hope that helps! Let me know if I can clarify anything.
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