In short - no.
Entra tenant is an entity that exists outside and independently of an Azure subscription. In other words, you do NOT create an Entra tenant IN an Azure subscription.
You can create multiple Entra tenants by using the Azure portal, but this in no way implies that the tenant exists within a subscription that you are connected to via the Azure portal.
Btw. keep in mind that a tenant can exists without an Azure subscription. The opposite is not true - every Azure subscription must be associated with exactly one Entra tenant. A single Entra tenant can be associated with multiple subscriptions.
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hth
Marcin