Derived Class Does Not Show odata.type

Short summary (3-5 sentences) describing the issue.
I have an entity that has a property, and that property is a complex type. When I return a derived class from the abstract complex type the @odata.type is not returned. This causes issues when I am trying to use graph.microsoft.com because graph can't determine it is the derived class.

Assemblies affected

Which assemblies and versions are known to be affected e.g. OData .Net lib 7.x
.NET 7
Microsoft.AspNetCore.OData v8.2.0
Microsoft.OData.Core v 7.16

Reproduce steps

Use repo https://github.com/OData/odata.net/files/13048351/WebApplication3.zip (from OData/odata.net#2774)

Run it and send request: http://localhost:5197/odata/IdentityGovernance/PermissionsAnalytics/Findings/%7Bkey%7D/WebApplication3.Models.ExternallyFinding/AccountsWithAccess

Expected result

{
    "@odata.context": "http://localhost:5197/odata/$metadata#identityGovernance/PermissionsAnalytics/Findings('key')/WebApplication3.Models.ExternallyFinding/AccountsWithAccess(WebApplication3.Models.EnumeratedAccountsWithAccess/Accounts())",
    "@odata.type": "#WebApplication3.Models.EnumeratedAccountsWithAccess",
    "Accounts": [
        {
            "@odata.type": "#WebApplication3.Models.AwsAuthorizationSystem",
            "AuthorizationSystemId": "123",
            "AuthorizationSystemName": null,
            "AuthorizationSystemType": null,
            "AwsTitle": null
        },
        {
            "@odata.type": "#WebApplication3.Models.AwsAuthorizationSystem",
            "AuthorizationSystemId": "456",
            "AuthorizationSystemName": null,
            "AuthorizationSystemType": null,
            "AwsTitle": null
        }
    ]
}

Actual result

{
    "@odata.context": "http://localhost:5197/odata/$metadata#identityGovernance/PermissionsAnalytics/Findings('key')/WebApplication3.Models.ExternallyFinding/AccountsWithAccess(WebApplication3.Models.EnumeratedAccountsWithAccess/Accounts())",
    "Accounts": [
        {
            "@odata.type": "#WebApplication3.Models.AwsAuthorizationSystem",
            "AuthorizationSystemId": "123",
            "AuthorizationSystemName": null,
            "AuthorizationSystemType": null,
            "AwsTitle": null
        },
        {
            "@odata.type": "#WebApplication3.Models.AwsAuthorizationSystem",
            "AuthorizationSystemId": "456",
            "AuthorizationSystemName": null,
            "AuthorizationSystemType": null,
            "AwsTitle": null
        }
    ]
}

Additional detail

Optional, details of the root cause if known. Delete this section if you have no additional details to add.