Vertical and Horizontal Scroll Bar not always visible

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Category

[ ] Enhancement

[ ] Bug

[ x] Question

Version

Please specify what version of the library you are using: [ 3.20.0 ]

I am using a listView with has many columns, but also has many rows.
And i want to have the following behavior, i want to column scroll bar to always be present at the bottom of the webpart, so that a user can use it to scroll the other columns.
Right now it is only shown if i scroll down to the last row, So how can i get this done.

Also would it be possible to add a context menu on right click of each row?

Thanks!

Start with the listView control and the linked documentation, then reproduce the behavior with many columns and rows in version 3.20.0. Clarify whether the goal is a permanently visible horizontal scrollbar, a row context menu, or both, and define the expected behavior before identifying the relevant implementation and tests.