If thats the yard stick you should boycott everything coming out of china, which is pretty much everything, since they are one of the largest polluters globally.
https://ourworldindata.org/explorers/co2?country=CHN~USA~IND...
I feel you'd need to adjust the sum total by something, capita, or square footage or be more specific like does a manufacturing X in China pollute more than an equivalent one in the US, etc.
China is still about double the US, and the US is lower than Canada.
Not all goods and services involve the same process, some come with more pollution.
For example, Nvidia will contribute to a big chunk of US GDP, but it only designs the chips, which won't have the same pollution impact as the country in which they'll have it manufactured.