Thank you for posting your question in the Microsoft Q&A forum.
Based on the information you have provided, looks like you want to see who is in charge for the current week.
May I know if you are using SharePoint Online or SharePoint App?
Where do you want to show the dynamic text, in the exact Calendar List or in a specific SharePoint page?
You mentioned that you have current week filter, I suggest you use this workaround.
You can create a view named "This Week", only show 2 columns (current week with filter "yes" and responsible person)
So that you won't be distracted by other columns' information.
To show the dynamic text, it might involve using Power Automate feature.
Due to limitations in this area, I regret that I’m unable to assist you effectively. I kindly recommend reaching out directly to the Microsoft Power Platform Community Forum Thread, as they are best positioned to address and resolve this type of issue efficiently.
I hope this information helps.
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