Anyone knows Marketing Cloud custom API endpoint (Cloudpage code resource ) limit to handle multiple and concurrent API calls at the same time?

We have implemented a "Marketing Cloud Custom API endpoint" using "Cloudpage code resource" which MuleSoft is using to make API calls from MuleSoft to SFMC Code resource endpoint.

For above we need to understand how many concurrent API calls SFMC custom API endpoint can handle at the same time?Can someone help here and share your thoughts or experience if you have encountered any issue for multiple concurrent calls to SFMC custom API endpoint ?