Your invoices stay in reach after your plan ends
When a plan ends, Settings, Billing & plans shows the plans again - and now also Billing Portal, above them. Choose Open Billing Portal to download the invoices of the plan that ended, or to add a tax ID, in Stripe's billing portal.
Before, the door went away with the plan, and an old invoice took a message to a person. A workspace that never paid has no invoices, so it shows no door.