There's not really enough to go on. That looks like the pumping end could be similar to this.
View attachment 145060
I bought one of these to pump tractor fluid when I changed it. It worked like a champ for that, but a year later when I tried to use it for motor oil, it wouldn't work. I threw $10 at another one which never worked. These have a rubber vane spider that are intended for water, oil probably softened it and destroyed it.
It's possible that Temu pump is different, but they don't give much information and your recourse is weak.