Do you want surround sound outside?
I already have the surround system set up and working via Spotify on my phone etc.
i want to buy projector that I’ll be able to connect to the system
Simply connecting five speakers to a SONOS AMP does not achieve surround sound because AMP is a two channel device.
Typically you’ll need to provide an HDMI-ARC or HDMI-eARC connection between the projector and the AMP if you want surround sound with the projector. This AMP will support the front L/R channels. A second AMP will support the rear L/R channels. The front AMP will generate a “phantom” front center channel.
If all of the sources are back in the closet, you’ll need a video source selector for the projector and an HDMI-ARC audio extractor for the AMP’s.
Running long HDMI cables can be fraught with issues and the technology is changing. Consulting with a pro might be a good idea.
I saw that Apple TV can be connected wirelessly is it the case ?
Apple TV is a video source that must be wired to a TV or projector input. Apple TV can connect to the local network or phone/pad/computer wirelessly.