In App Service (Web Apps, API Apps, or Mobile Apps), an app always runs in an App Service plan. An App Service plan defines a set of compute resources for a web app to run.
One App Service Plan : Correct Choice
For an Azure Web App, you need to have an Azure App Service Plan in place. You can associate multiple Azure Web Apps with the same App Service Plan. Hence to save on costs, you can just have one Azure App Service Plan in place.
An Azure Load Balancer : Incorrect Choice
An Azure load balancer is a Layer-4 (TCP, UDP) load balancer that provides high availability by distributing incoming traffic among healthy VMs. A load balancer health probe monitors a given port on each VM and only distributes traffic to an operational VM An Application Gateway : Incorrect Choice Azure Application Gateway is a web traffic load balancer that enables you to manage traffic to your web applications. Traditional load balancers operate at the transport layer (OSI layer 4 - TCP and UDP) and route traffic based on source IP address and port, to a destination IP address and port.
10 Azure App Service Plans : Incorrect Choice
For an Azure Web App, you need to have an Azure App Service Plan in place. You can associate multiple Azure Web Apps with the same App Service Plan. Hence to save on costs, you can just have one Azure App Service Plan in place. So there is no need for 10 App Service Plans.
Reference:
https://docs.microsoft.com/en-us/azure/app-service/overview-hosting-plans
https://docs.microsoft.com/en-us/azure/virtual-machines/windows/tutorial-load-balancer
https://docs.microsoft.com/en-us/azure/application-gateway/overview

https://www.cloudelicious.net/azure-vms-and-their-temporary-storage/
https://docs.microsoft.com/en-us/azure/virtual-machines/troubleshooting/redeploy-to-new-node-windows#:~:text=Redeploy%20Windows%20virtual%20machine%20to%20new%20Azure%20node&text=When%20you%20redeploy%20a%20VM,configuration%20options%20and%20associated%20resources.

Step 1 (E): Install the Azure File Sync agent on Server1
The Azure File Sync agent is a downloadable package that enables Windows Server to be synced with an Azure file share Step 2 (D): Register Server1.
Register Windows Server with Storage Sync Service
Registering your Windows Server with a Storage Sync Service establishes a trust relationship between your server (or cluster) and the Storage Sync Service.
Step 3 (C): Create a sync group and a cloud endpoint.
A sync group defines the sync topology for a set of files. Endpoints within a sync group are kept in sync with each other. A sync group must contain one cloud endpoint, which represents an Azure file share and one or more server endpoints. A server endpoint represents a path on registered server.

Rule 2 is blocking HTTPS access (port 443) and has a priority of 500.
Changing Rule 5 (ports 50-5000) and giving it a lower priority number will allow access on port 443.
Note: Rules are processed in priority order, with lower numbers processed before higher numbers, because lower numbers have higher priority. Once traffic matches a rule, processing stops.
Reference:
https://docs.microsoft.com/en-us/azure/virtual-network/security-overview

Network Watcher Connection Monitor enables you to configure and track connection reachability, latency, and network topology changes. It helps reduce the amount of time to detect connectivity problems. The returned results can provide insights into whether a connectivity problem is due to a platform or a user configuration problem. This is not used in cases where we need to inspect for all the network traffic from one vm to another vm.
On the other hand Network Watcher packet capture allows you to create capture sessions to track traffic to and from a virtual machine. So in this scenario we need to use Network Watcher packet capture Reference:
https://azure.microsoft.com/en-in/updates/general-availability-azure-network-watcher-connection-monitor-in-all-public-regions/#:~:text=Network%20Watcher%20Connection%20Monitor%20helps,or%20a%20user%20configuration%20problem
https://docs.microsoft.com/en-us/azure/network-watcher/network-watcher-packet-capture-manage-portal