Spun un a Drupal 8.8.5 from the dashboard but from https://dev-example.pantheonsite.io/admin/modules the “Install New Module” button is missing
The workaround that Joseph and Albert found to get that button back again is by visiting https://dev-example.pantheonsite.io/update.php, do the updates from there and the button should be there again.
Would this be a default behavior or ss this an issue with the lastest Drupal? Would it also be platform related? Where would this be best reported to?