Azure Function App Service Plan. Azure functions are based on the webjobs concepts and technology. Be default an app service plan has only a single instance, and you will only pay for that 1 instance if you host multiple function apps, app service web apps, etc on that same plan.
I use the change app service plan option for the web app. The two app services plans are in the same location and have the same pricing tier. Microsoft azure app services are a platform as a service (paas) offering.
I read microsoft documentation and they mentioned that functions that run under app service plan does not timeout.
As per jeff hollan’s sample: (bear in mind the following limitations). Provide the required details such as app name, hosting plan, subscription, os, resource group. Azure functions run inside azure function apps, which is an app service type.