If you didn't get it in the first week or so then there's a problem on your end, with your vehicle or network. You can do some basic troubleshooting on your own with https://rivianroamer.com/ and by rebooting your vehicle. Check in the vehicle too, because the app might not be showing you the update. Make sure you're connected to the WiFi, and test that you're connected.
If you don't detect any problems with these steps, then at this point (more than 3 weeks after it began to roll out to Connect+ subscribers) it's perfectly reasonable to call Rivian and ask them to push the OTA to your vehicle.
