Apple tv 4K + Yamaha RX-A2A NO Dolby Atmos

Recently I got a new receiver Yamaha RX-A2A with new firmware updated, when using Apple 4K tv box ALL I can get is PCM output when connected to the receiver using HDMI 2.1 cables.

Previos the box was connected direct to a Sony Bravia XBR and on the info I saw Dolby Vision and Dolby atmos displayed on the tv, I know Atmos requiere more than 2 speakers but the units were able to comunicate no problem. Since I have introduced the RX-A2A to the system I can not get atmos , I am able to see Dolby vision using the receiver, but no Atmos.

does any body have experience this issue ? can someone give me some feed back on tis issue ?, very much apreciated.