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Visio and Project are not included in the Office suite, but are sold as stand-alone applications. If you don't have Visio and Project, you can buy or try them.
For more information:
Install Visio or access Visio for the web
Besides, which version of Office are you using?
Please refer to this article to determine whether Visio and Project can be installed on the same machine as other versions of Office.
Hope the information could be helpful to you. Any updates, please let me know.
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