For sure, they were caught off guard about Georgia. They should have seen that coming with the closeness of 2018 governor's race. I recall he visited Arizona fairly frequently...he just got beat there. I was honestly surprised he did as well as he did (holding onto Florida and NC) while losing GA.
There was a period in late September/early October when both campaigns behaved as if Biden had a clear lead in NC. It also seems like Trump did not mount a top tier effort in AZ vs. the swing state east of the Mississippi, which is odd, because he clearly caught on to NV being closer than 2016.