Hi @JDuffy9,
Notes import is possible.
To import notes what you can do is create 2 files in the defined format (please check the screenshot) and then go for importing multiple files with multiple object associations.
You can check the below example for notes import. The below sample is for contact objects but you can do it for any object and make changes in the format in the sheet accordingly.
Note: The activity date is in DD/MM/YYYY format.
I hope this helps.