Paul has done a good job which but there would be a simpler way that cuts down on the code looping through subfolders.
There are shell (command prompt) commands that can do the iterative deletion more simply. Refer to
Recursively Delete a Specific File Type from all Subfolders | SumTips for an example of one line deleting all files in subfolders.
Running Shell commands in VBA
https://www.myonlinetraininghub.com/...mand%20Prompt.
You would most likely still want Paul's folder selection code.