t2 to t3a compatibility issue, ena driver not attached to eth0

I am trying to change a working t2.small instance to a t3a.small instance and getting a compatibility error trying to start the instance as a t3a.small. I have run the nitro_check_script.sh on the instance and it has returned three Oks. Doing a modinfo ena, I see that the ena module is loaded. However, when I do an ethtool -i eth0, the installed driver is shown as vif and not ena. This is the only incompatibility I can find. I am running Ubuntu 20.04 and it is completely up to date. How do I go about installing the ena driver on eth0 instead of the vif driver? I have tried modprobe ena and I get an error message that the operation is not permitted. Any assistance in getting this instance running as a t3a.small would be appreciated.