React MUI table values

Does anyone know how to show in an Alert() the value of the “Position” column when a button is clicked?

The button(s) are added as an extra Row as well as their corresponding column.
In the MUI documentation it tells me that I can access via params.row.position, when it is a full table, but in this case that I have an extra column/row added it doesn’t seem to work.
Any ideas?
Thanks in advance