They clearly show wear.
I am not sure if they were replaced from another older device, or the entire cover is from L390, but that one would have a plastic cover for where this one has a stylus. It doesn’t seem like anything was snapped out of there.

I couldn’t find replacement ones online, and I am not sure if contacting the shop is a good idea. See, the L390 Yoga has a touchscreen with better colors and seems to be a bit more expensive (but not much).
However, I bought this as “L390”. I noticed the description said “Touchscreen: yes”, which I realized meant they likely mistook the Yoga version for the base version. Indeed, that is the case.
Currently they have one L390 Yoga in similar condition and same configuration, but the screen has some white spots (this one is flawless), …and it’s €46 more expensive.

If you’re curious, i5 8365U, 16GB RAM (single-channel), used 256GB Samsung SSD (I don’t remember if SATA or NVME), €180 and 2 year warranty.

Also, if you’re wondering what that port with network symbol is, it appears to be a proprietary connector used on ThinkPads requiring an “Ethernet Extension” adapter to be usable.