I've noticed that the way the Chinese stores ship is different to Amazon etc. Amazon will ship with a single shipper from source to destination with single tracking. When it leaves the fulfillment center it enters USPS tracking for example and then moves the entire route through USPS. They do this world-wide.
The Chinese stores ship consolidated bulk to the country of destination, then breaks out into other local couriers. Temu for example uses four couriers in South Africa, but two bulk shippers from China to South Africa. If you look at the tracking information, there is a delivery closeout on the bulk shipper when it hands it off to the local courier or postal service. Temu seems to understand this and while reporting it on their tracking, knows it hasn't actually been delivered. Other store brokers like Aliexpress often don't and see it as a delivery. Especially when it is handed off to the postal service and not a courier. Then when you query, the seller probably gets confused and thinks it is delivered.