Hi Jonah,
Thank you for querying in this forum.
From your description, it seems that you are using Microsoft flow to create Planner tasks for each row in Excel. And you encountered some issues when you created a variable for the name and using it as a stand-in.
If my understanding is right, we’d also want to help you, since our category focus on SharePoint Online built-in features, the question you mentioned is related to Microsoft Power Automate, to make sure you get professional help, we’d you go to Power Automate Community to post a new thread. Which is specific channel to handle related questions. And engineers in that forum will focus on your specific scenario and provide specific suggestions.
Your understanding and patience will be highly appreciated. I hope that you are keeping safe and well!
Best Regards,
Sukie