If I use Application insight for my azure function I can see that it works. Screen shot here.
I have published my azure function to azure and it works perfect. I have switched on Appligation insight but when I look at monitor for my azure function I can see that both success count and error count is always zero. I know that my azure function works because it insert record in my database. I have waited much longer than 5 minutes but nothing happens. My azure function is done in .Net Core 3.1.
I mean that since all monitoring for Azure Functions is done with Application Insights by default it should update success count and error count