Active geo-replication is a feature that lets you create a continuously synchronized readable secondary database for a primary database. The readable secondary database may be in the same Azure region as the primary, or, more commonly, in a different region. This kind of readable secondary database is also known as a geo-secondary or geo-replica.
https://learn.microsoft.com/en-us/azure/azure-sql/database/active-geo-replication-overview?source=recommendations&view=azuresql

Explanation:
Box 1: Microsoft.Sql/managedInstances
There is a need to support cross database queries.
Box 2: parameters('virtualNetworkName')
The Managed Instance depends on the Virtual Network.
{
"type": "Microsoft.Sql/managedInstances",
"apiVersion": "2020-02-02-preview",
"name": "[parameters('managedInstanceName')]",
"location": "[parameters('location')]",
"dependsOn": [
"[resourceId('Microsoft.Network/virtualNetworks', parameters('virtualNetworkName'))]"
]
}
Reference:
https://docs.microsoft.com/en-us/azure/azure-sql/managed-instance/create-template-quickstart?tabs=azure-powershell

Explanation:
You are loading data into Table1, which means there is some inserts going on. Note that insert statements is also considered a query. It should be scale resource in order to reduce the time insert data into Table1.