You can find direct source packages and some binaries at the Qt download archive.
Download the latest online installer from the official Qt download page. During the "Select Components" step, you must check the "Archive" box and click "Filter" to reveal older versions like 5.15.2. download qt creator 5.15.2
Because Qt 5.15.2 is an older "archived" version, it is no longer the default option in the standard installer. You can access it through the following official channels: You can find direct source packages and some
For users with a commercial license, offline installers for Qt 5.15.2 are available directly through the Qt Account portal. Installation Steps for Open Source Users Install Qt creator 5.15.2 - Qt Forum download qt creator 5.15.2