Yep. No registration needed in most countries as it weighs 249 grams, 1 gram shy of the registration limit.
From DJI's site...
The weight of 249 grams places Mavic Mini in the lowest and safest weight class of drones, which in many countries may exempt it from certain regulations. For example, in the United States and Canada, you can fly Mavic Mini without the need to register your drone with the government.
DJI even makes a 199 gram version for Japan, by removing one of the cells from the
battery, to meet the limit of Japan.
From DJI's site...
The international version of Mavic Mini weighs 249 grams. The Japanese version of Mavic Mini weighs 199 grams, as drones under 200 grams are not subject to the drone flight rules according to Japanese aviation law. Due to the difference in weight and capacity of the two batteries, always use the Japanese battery (1100 mAh) when using the Japanese version of Mavic Mini.
I also understand that there are two different region versions.
One for FCC and the other for CE.
Regardless if it's registered or where it's flying, please fly responsibly. ?