You are welcome.
Correct. Wi-Fi only models are not affected by the issue at all, those models do not have a SIM card slot and also no visible antenna (for cellular connectivity) on the back of the device.
Left is Wi-Fi, Right is Wi-Fi + Cellular.
Now for the iPad 2, if you have that model, only the CDMA cellular variant is affected, but not the GSM cellular variant. CDMA is mostly used in the US, while GSM is Europe.
You can also provide us with the model number of your device, you can find that one in Settings --> General --> About.
If there is no 9.3.6 available for your iPad, the chances are high that you either have the Wi-Fi only version or the GSM cellular model, neither of those two require 9.3.6 and they continue to work after the 3rd of November.