For the UE marketplace, the sellers can select the pricing…once. Not per country/region/anything, but just “thats the price”. Everything else is done by Epic automatically to adhere to the individual country’s tax laws. So, no chance to blame this on the sellers.
Thats indeed quite bad and i would suggest talking with Epic about that. Sellers MUST support their product for at least the current engine version.
Please also note that because of the amount of updates that came in, it took quite a while for Epic to update all of the assets (not sure if the process is finished for all updates already), so it could well be that the update was already submitted by the seller some time ago, but is still in the queue to be published.
Cheers,