Hi Cindy,
I hope I'm understanding what you're asking, in which case there is an easy solution. When the attribute table is open in the web map, click on the triple bar icon in the top right and, when a feature is highlighted, click "Center On Selection". See screenshot:
Sometimes it seems to actually change the zoom scale for me, other times it only centers on the selection, but in that case you can just scroll in. Does that help? Alternatively, you could share the web map as a web app. In the attribute table view in a web app, there is an option to "zoom to".
-Katherine
Best,
Katie
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