Uzbekistan Airways now has Boeing 787-8s and those have 4.7 tons greater cargo capacity than 767s. They may not be able to carry a full cargo payload when full and servicing long flights, that shouldn’t be an issue for Tashkent – London for instance. It makes sense for the carrier to consolidate operations.
However given Amazon’s penchant for growing its cargo fleet I wonder if listing the planes on Amazon Marketplace might turn out to be a more effective platform.