Can smartcard work on London bus now?

I am thinking to switch my paper annual ticket to smartcard. According to this thread (https://forum.southwesternrailway.com/ticketing/f/forum/457/why-doesn-t-my-1-6-zone-travelcard-work-on-buses-via-my-smartcard), smartcard did not work on London bus. Does anyone know if this has been resolved, or I need to do something extra to ride London bus after switch? Many thanks!

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