Although this linked article mostly focusses on the hosted cloud side (I suppose that is the equivalent of Google Docs) there is actually a very good open source desktop app available called ONLYOFFICE Desktop Editors which installs on Linux, Windows, and macOS, with apps also for Android and iOS.
The desktop app connects not only to ONLYOFFICE cloud, but optionally also to Nextcloud, ownCloud, Moodle, Liferay, Seafile, and infomaniak kDrive.
Although ONLYOFFICE Desktop Editors do work in open document format (the international standard) it actually prides itself on having very good docx compatibility. It’s menu ribbon is probably also closer to MS Office than LibreOffice is.
What I also like about it, is it starts up in a few seconds.