Hi KitTG,
Thank you for your message in this forum.
According to your description, it seems that you cannot find the tables of the spreadsheet when you created Power Automate. Since our category focus on SharePoint Online built-in workflow, to make sure you get professional help, we’d suggest you go to Power Automate Community to post a new thread, that’s a specific channel to handle related questions.
We appreciate your understanding!
Best Regards,
Sukie