Usually in the US, unless it’s a massive city, vendors selling things out of their yards/trunk are ignored. It’s when you have a permanent/semi permanent stall that things get serious. Also selling things out of your trunk opens you up to significant liability risks if someone gets sick and can find you.
>>dyausp+(OP)
Depends heavily on the city too. I think this kind of thing is more accepted in NYC and LA with big immigrant communities from countries with more informal economies, but in Seattle it gets shut down quickly.