As with everything, it seems, it depends on who you ask. The WHO shows some overlap. Some US states have high obesity, some low. Some European countries are above some states, even if the US is incrementally higher overall. Oregon, for example, is just a small amount higher than UK. Greece should be higher than UK IIRC, but I did not memorize the table.

Nobody with a 1 in 4 obesity rate is in much of a position to point fingers, it's pretty clearly a global problem. I see no reason to suggest that regulation is helping anyone. Food culture is probably the biggest single factor.