BusinessScenarioData.Read.OwnedBy

const options = {
	authProvider,
};

const client = Client.init(options);

const businessScenarioPlanReference = {
  target: {
      '@odata.type': 'microsoft.graph.businessScenarioGroupTarget',
      taskTargetKind: 'group',
      groupId: '7a339254-4b2b-4410-b295-c890a16776ee'
  }
};

await client.api('/solutions/businessScenarios/c5d514e6c6864911ac46c720affb6e4d/planner/getPlan')
	.version('beta')
	.post(businessScenarioPlanReference);

Import-Module Microsoft.Graph.Beta.BusinessScenario

$params = @{
	target = @{
		"@odata.type" = "microsoft.graph.businessScenarioGroupTarget"
		taskTargetKind = "group"
		groupId = "7a339254-4b2b-4410-b295-c890a16776ee"
	}
}

Get-MgBetaSolutionBusinessScenarioPlannerPlan -BusinessScenarioId $businessScenarioId -BodyParameter $params

# Code snippets are only available for the latest version. Current version is 1.x
from msgraph_beta import GraphServiceClient
from msgraph_beta.generated.solutions.businessscenarios.item.planner.get_plan.get_plan_post_request_body import GetPlanPostRequestBody
from msgraph_beta.generated.models.business_scenario_group_target import BusinessScenarioGroupTarget
from msgraph_beta.generated.models.planner_task_target_kind import PlannerTaskTargetKind
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = GetPlanPostRequestBody(
	target = BusinessScenarioGroupTarget(
		odata_type = "microsoft.graph.businessScenarioGroupTarget",
		task_target_kind = PlannerTaskTargetKind.Group,
		group_id = "7a339254-4b2b-4410-b295-c890a16776ee",
	),
)

result = await graph_client.solutions.business_scenarios.by_business_scenario_id('businessScenario-id').planner.get_plan.post(request_body)