You can’t even do surround audio over Bluetooth. Its a terrible idea for your configuration.

If Bluetooth is your only connection, it’s a waste of time setting up a full Home Theater setup.

Get a Sonos speaker that offers a Bluetooth input and is not configured as a surround. Don't do Bluetooth here so I never remember which ones do.

Connect it to your Bluetooth source, group all the rest of your Rooms to it.

Play your sound with the usual delay from your picture and in stereo, also at the quality limits of your Bluetooth link.

Better yet, go with the first answer above.

Thank you for your answers! To be more precise in my request:

I cannot put an HDMI cable between a Sonos Arc Ultra (Bluetooth integrated in this model) and my connected video projector which is installed on the ceiling.

So to the extent that normally via the Sonos application we can associate a Sub + 1 pair of Era 100 or Era 300 in Surround to Arc Ultra, I am trying to reproduce this configuration but via the Bluetooth connection and not HDMI

that is a question ? ;) 

Bluetooth in Sonos speakers is receive only from something like a cell phone, tablet etc. They do not transmit. Also, as ​@controlav alluded to it’s an ill-advised video solution for anything beyond stereo audio with Sonos or any surround system for that matter.

ok AjTrek1 yes sorry it's my video projector that would connect via bluetooth to a sonos device.

So I conclude that for the desired use (cinema sound!) only an HDMI / video projector connection to Sonos / Arc Ultra associated with Sonos Sub and 1 Sonos Era pair could do the job!
Thank you for your answers and wise advice 👍🏼