STM32CubeIDE 1.8.0 is no longer the latest release, it remains a notable version for its specific integration milestones within the ST ecosystem. You can typically find it by navigating to the Official STM32CubeIDE Download Page
To help you decide if tracking down the is worthwhile, here is a comparison table: stm32cubeide 180 download link
ST does not keep old versions publicly listed on their main download page, but they keep all previous releases on their server. You can access v1.80 directly using these links: STM32CubeIDE 1
STMicroelectronics does not keep every single old version prominently on their main product page. However, they maintain a robust "Version History" system. Here is the exact method to obtain the : stm32cubeide 180 download link