Delivery companies act as tariff agents and collect tariffs for Customs and Border Protection, so, yes, if you were the importer of record on a delivery, it is quite likely that you paid the tariff via the delivery company.
These are likely to be refunded, because even if you were the purchaser of the product, you were the importer of record and paid the tariff, not a downstream buyer who paid an increased price because of the tariffs.
These are likely to be refunded, because even if you were the purchaser of the product, you were the importer of record and paid the tariff, not a downstream buyer who paid an increased price because of the tariffs.