The FCC notice is painful to read. This is my interpretation of it:
2025-12-22: The FCC changes rules to prohibit import of foreign-made UAVs.
2026-01-21: Waivers are issued to allow UAV vendors to continue updating devices already in the US. These waivers expire on 2027-01-01.
2026-03-23: The FCC changes rule to prohibit import of foreign-made routers. Waivers are issued to allow vendors to keep updating routers until 2027-01-01.
2026-05-08: All the waivers’ expiration is pushed back until 2029-01-01, and the division of the FCC which issued them (the OET) is recommending the rules be changed to allow updates forever without a waiver.