Hi, is there a way that I could copy all my Drafts to Apple Notes at once?
You could write a Shortcuts shortcut to iterate through a query against drafts and create a note within Apple Notes of the content for each draft returned.
Using the option to run an option against a selection of Drafts and then utilising a share sheet-based action could work too, but I suspect would be quite painful to select the destination for each time if you have more than just a handful of drafts to transfer.
You can export all drafts as HTML with this Action:
https://actions.getdrafts.com/a/17f
And then (on Mac) import the HTML files into Apple Notes:
https://support.apple.com/en-us/HT205793
Takes about 3 minutes to do