Anytime you play Madden online kicking does suffer with Madden 22 coins minor latency issues, but that is the situation across all variations of this game -- not only Stadia. This year it's worse than usual so that you should absolutely expect to overlook a few field goals and extra points. They must have changed the net code for how kicking is managed or something because even on PS4 and PS5 I had been having issues hitting kicks just right and these issues persist at the Stadia variant.
Google recommends at 10Mbps download speed for 720p streaming, 20Mbps download rate for 1080p streaming, and at least 35Mbps download speed for 4K streaming. As for me, I pay an extra fee to have boundless information on my private home network. However, for anyone without that choice, data usage is a large element for Stadia games.
In terms of information use, it will of course change based on your quality preferences. If you are aiming to perform Madden NFL 21 using Stadia Pro at 4K then you're probably looking at around 16-20GB of data usage per hour.
As this is a game you can play solo, online, or anyplace with friends on the same Stadia link (through Chromecast with multiple Stadia controls or on mobile or a PC browser with numerous controllers plugged in), it's not possible to know precisely how much data it will suck since hours will vary for everyone.
I played with Madden NFL 21 on Chromecast during my 4K TV, on PC at a Microsoft Edge Browser, also on mobile with the Razer Kishi and utilizing just touchscreen controllers. Unexpectedly, Madden is actually quite playable using touchscreen controllers as soon as you get accustomed to where the digital buttons are located. I'm still frustrated that I can not remap or alter where the buttons are on my screen since doing things such as holding R2 to sprint are embarrassing when you'd like to cheap Mut 22 coins also be able to cover the ball up prior to an effect or quickly juke with the right stick.