Inputting repeat endings
You can input repeat endings using the Repeat Structures panel. There is no popover for repeat endings.
You can open the Repeat Structures panel by clicking Repeat Structures in the Notations toolbox.
Procedure
Result
The repeat ending is input, with the first ending segment covering the bars in which you selected notes, and a second ending segment created automatically in the following bar.
An end repeat barline is created at the end of the first ending if none exists already.