If you don’t mind the note files not actually being created, but rather simply linked to, this technique may be of some use: Auto-create new notes by linking to them - #43 by I-d-as
You could also support the feature request that reply was in response to that suggested a function to auto create links. Short of that, I have had some success using an AHK macro with a loop to traverse the list of links with down right and left arrows (moving cursor within brackets on each line, however there are some catches to be aware of), hitting alt enter, then finally navigate back hotkey, and repeat. It is helpful to add some sleep time depending on size of vault.
I actually also created an AHK macro for triggering the find and replace and entering all the symbols and using a sequence of tabs and enters to automate things. It is pretty fun to try, but be careful.
I am sure there is a much better way. I would definitely be interested in the script @koala created, although I am using Windows.
Thanks.