Delete file older than X days using file name

Hi, im new in scripting. My purpose is want make a script that can delete file automatically for example (older than 2 month) but using file name because my file name already recorded as date
(XXXX_XX-MM-DD-YYYY-XXXXXXXX.zip) due my file modified date sometimes not correct.

Below are my script, can help me check what is the problem?

You cannot select files older then certain timestamps by timestamp in their name using a simple file mask. You can only select all files for a specific date like:

If you need to delete even files with older dates, you need to use PowerShell:
https://stackoverflow.com/q/49656000/850848

that code works but i want to delete file for example older than 30day+
same function like
The code that u give only delete folder older than 30days ONLY.

Please advise. Thanks

Did you read my previous post to the end?