My $0.02:
A medium size parcel sent "priority" via US Mail to me from the USA March 10th finally arrived here today May 15th after languishing in various depots en route, getting covered in coronavirus. Yummy. Now wash your hands
Another item bought on the auction site and sent from the USA via the GSP courier programme arrived in ten days, i.e. as normal.
A UK parcel sent to me two weeks ago still hasn't materialised.
But the several dozen other items I've sent out and received have arrived mostly as normal.
So my conclusion is, it's a bit pot luck at the mo.
Phil