REST Admin - Orders API - Is it possible to filter orders by "tags"?

We are trying to filter orders by “tags”, there is no parameter listed in the API doc - Order - REST

However when we try “tag={tagname}” it is filtering the orders by the tag name. And when we have tags with any special characters (for example #1001), it retrieves all the orders

Method - GET
URL - /admin/api/2021-01/orders.json?tag=test

Is this a feature in the pipeline? We are just trying to understand if this is stable enough to use as it is not documented.