US-sub & traveling in Europe...issues?

I see so much talk about VPN workarounds and buying subs from cheaper countries...I am not really interested in that, but have a question around the following scenario:

I am coming from YoutubeTV, and cancelled this winter due to cost.

I am planning to subscribe to F1TV Pro (IOS / Apple devices) with a US subscription, since I reside there. However, I do spend some time in Europe (Spain) throughout the year, so was wondering if anyone has lived through a scenario like this and has feedback:

With a US sub, when I'm in Spain, do I need to use a VPN to watch races, or will it just work?

Thanks F1 fans!