If all is well, then The Things Network will some day support downlinks for LoRaWAN Class A. See Receive Windows on page 12 of the LoRaWAN specifications.
See also page 73 for examples, including "confirmed uplink". But note that it's apparently not a good idea to make every uplink a confirmed uplink:
Fair Access Policy: Practice
- [...]
- Downlink bandwidth is even more restricted
- you can’t send all messages as ‘confirmed uplink’