As a new poster, you should have started your own main Pages post, however…
Pages is no Word clone, and depending on what features you use in Pages, that translation process may not be able to produce a suitably formatted Word document or none at all. That's the risk you take in using Pages to create Word documents, and why Apple does not guarantee that the translation will occur, or that a resulting Word document will appear identically in MS Word.
Translation woes aside, you should have been able to select Share menu > Send a Copy > Mail > Word to generate a Word attachment to a new Mail compose window.
If you don't want to play translation export games, then either use the current MS Word, or a third-party Word compatible suite like Softmaker's Office 2021 which opens and saves Word documents in their native document format. The free LibreOffice Suite is relatively compatible with MS Office from a document standpoint, but the learning curve is steep, even with their comprehensive documentation.
I am using Pages v11.2 on either macOS 11.6.3, or macOS 12.2.1, and have no export issues to any document format. Ensure you are using the current Mac App Store version of Pages compatible with your operating system, whether on iPadOS, or macOS.