It's kinda hoakey on my Pixel 3 also. ET Project sits and spins trying to connect, then says it failed to connect. Immediately after it says it connected to an unlisted device, and from there on seems to work properly. ET Ride can't connect at all. Even after Project has connected and the device is listed among connected devices under the system bluetooth settings... My guess is Google added some permission for enumerating BT devices at some point, and the E-Tube apps aren't configured to request it, so are unable to find the WU.