Some, but not all, US ISPs have caps on Internet use in the US. The cap is usually one terabyte. There’s a long list of them at https://broadbandnow.com/internet-providers-with-data-caps , the biggest offenders being AT&T, CenturyLink, Cox, Viasat (which, yes, is satellite Internet), and Comcast (a.k.a. XFINITY).
The only reason why Spectrum, another big US ISP, does not have data caps is because they agreed, back in 2016, to the US Government to not have them for seven years when trying to buy other companies.
The only reason why Spectrum, another big US ISP, does not have data caps is because they agreed, back in 2016, to the US Government to not have them for seven years when trying to buy other companies.