Hi @anil kumar
They can. Azure functions can run in parallel
If it run out of resources it will scale (depending on the plan) but they scale together. Same with parallelism because one web app has only 1 host file:https://learn.microsoft.com/en-us/azure/azure-functions/functions-host-json
if you have 1 web app with different trigger types, like 1 http trigger and 1 event hub trigger, you can control some aspects of it, like the batch size for the event hub. but if they are all http triggers you can only set in 1 way