Maybe this one? It’s a refurbished model. Has dual HDMI outputs and supports a zone 2.
YAMAHA TSR-7850R 7.2CH Dolby Atmos DTS Wi-Fi BT 4K Receiver, Black (Renewed)
https://a.co/d/1OTGTm9
Have you considered installing cooling fans/dust filters/desiccant near the receiver since it is outdoors?