Wow, yea. Looks like USPS is being stricter with batteries. Just had my friend take the Pixel 8a in the USA to ship it to me and USPS wouldn't ship it via Priority International because of the battery.
Plan was to return and rebuy from Amazon and have it shipped to my NZ address, which was an option 2 weeks ago. But not it's not, this is shipped from Amazon too and not a third party..