Well, when the loop takes place there is a travel in time taking place… but not as in the standard time travel films.

I think is important to point out that in the Groundhog time loops the travel is only of the memories or the information, there is no energy-mass traveling (though information is a kind of energy, let me skip physics here), and the traveler at the beginning of the loop has not carried anything from the future but the memories of the previous loop, did not age or suffered physical modifications (there may be exceptions, sure).

So I think that is a kind of time travel, but a sub-genre where the travel is less material than in the typical time travels.