hi timothymartin73,
According to the zoom support article below, I do not think you can share computer audio on a iPad. Please see the support article for details.
“Prerequisites for sharing background music or computer audio on Zoom
Zoom desktop client for Windows, macOS, or Linux: Global minimum version or higher
Zoom Web App in the Chrome web browser”
Sharing background music or computer audio on Zoom
https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0063608
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thanks, eliot