Hello Kathy,
You can create a custom action based on a search context (a unique content) to click on a specific button inside a listview item that does not always has the same index. You can follow the steps written in this document:
https://docs.mendix.com/ats/howtos/ht-version-1/cab-11-find-itemrow
Kind regards,
Charlie
Hey Kathy! Create a custom action and do the rest. Alternatively, check the speed test here at clickspeedtest.info.