How to add multivalued .insert options without a multivalued section?

[VanPelt38]

Describe the bug
I would like to make some rows capable of editing (inserting new rows), without them being part of a multivalued section. E.g. a section has 5 normal rows, then an multivalued row, then 5 more normal rows. Using a multivalued section works but puts my row in its own section and out of sync with the rest of the rows. Is there a simple way of doing this currently?