Make sure the Google Sheet is stored on an FSGW Shared drive, not on a My Drive.
Open the Google Sheet
Choose File → Share → Publish to Web
A pop-over form will be displayed
Under Published content & settings near the bottom, make sure Automatically republish when changes are made is selected, which it is by default.
If the Google Sheet is already published, There will be a Stop publishing link just below Published content & settings and a Link will be displayed
Entire Document and Web page should already be selected. If not, then select those.
Click the Publish button
A pop-up will ask Are you sure you want to publish this Selection? Click on OK.
The pop-over form will briefly (hopefully) display a message saying it's Publishing…
When it says Published, select and copy the Link that is displayed. Note that the Link text extends well to the right of what is visible, so be careful to select all of it.
Paste the link into the wiki where you want it.
If you click on
Embed to the right of
Link, it will show
HTML code to display the published Sheet in an iframe, which might suit your needs better.