I belive it is because of this:
On July 30, the Trump administration removed the duty and tax exemption for parcels valued under 800 USD (just over 8,000 NOK), effective from August 29.
www.posten.no
It probleby count for pretty muc all shipping companies
Suspension of Parcel Deliveries to the USA Effective from Saturday, August 23
On July 30, the Trump administration removed the duty and tax exemption for parcels valued under 800 USD (just over 8,000 NOK), effective from August 29.
As a result, it will no longer be possible to send this type of parcel to the USA or Puerto Rico (a U.S. territory) starting Saturday, August 23.
The last day for submitting parcels to the USA valued under 800 USD will be Friday, August 22. After this date, Posten Bring will no longer be able to accept this type of parcel. Similar arrangements are being introduced in other countries as well.
The changes to the duty and tax exemption introduced by U.S. authorities mean that customers must now pay customs duties before parcels can be transported to the USA. The details of this process have not yet been clarified by U.S. customs authorities, and system solutions that postal companies can use have not yet been developed.
Postal companies across Europe are working together to gain clarity on the processes and solutions that U.S. customs authorities will require, but so far, no resolution has been reached. At the same time, the implementation date remains unchanged.
This situation creates uncertainty around transport options, return processes, and responsibilities, making suspension appear to be the only viable option.
Intensive efforts are underway to obtain the necessary clarifications so that solutions can be developed and parcel delivery can be resumed.