[ledgerdev]

My initial impression is NOPE, and the fact this cloud architect is pushing you towards azure functions says a lot. The run on windows, take forever to cold start but do work ok for background processes. Given you mention user facing endpoints, prepare yourself for 15+ second cold start times while they boot a windows VM for your function, and no private subnet for the functions either. The answer to this is a super expensive "Premium Plan" which basically just rebranded app service which runs the VM's for you full time at double the price. I have used them and am not an azure functions fan myself.

In the azure world, a more modern option going forward is azure container apps which just run docker containers, but you still will have 8+ second cold starts and will need to run at least a single instance full time, but it's cheaper than functions premium. Also would suggest looking at an evented architecture using dapr which is built into ACA. In the GCP world cloud run is frankly amazing.