How to add a full width collapse in a table repeat

I would like on a table for a dynamic collapse to work work details of the table row.
I can get this to work in a cell, however I would like the dynamic collapse to be 100% width without destroying the table row above it.
At the moment if I add a row under the table row, then it will only allow me to add a cell, which I can not get this to goto 100%

Screen Shot 2020-07-08 at 8.31.48 am2558×546 40.4 KB

Does anyone know a way of doing this.