InDesign - macOS Sierra

Hi @Didier231840063c8m,
Only the latest two versions of the Creative Cloud apps are supported and available for download, so that would be CC2022 and CC2021. You can try and download the older versions of the Creative Cloud apps from the following website. If the links mentioned on the website don't work, then it means that Adobe has discontinued providing the download and genuine installers are not available anymore. Be circumspect if someone contacts you claiming to provide an installer in such a case.

For your OS the version supported would be CC2019. However I would recommend that you upgrade your OS if you can and use the supported versions.

https://prodesigntools.com/adobe-cc-2019-direct-download-links.html
-Manan