This thing is called a Plux22. There is also a 16 and 21 pin variant aka 21MTC. It is a connector you find on model train decoders. I believe this is propriety design of one the model railway companies. I cannot find it JLCPCB anyways.
It is not just a normal female SMD connector. The mating male connector is inserted from the bottom and not from the top. There are holes in the board underneath the connector and the SMD leads do not obstruct them.
In this video you can see how 2 mating parts are fitted. The 21 variant is designed so you cannot accidently insert the 2 components in a wrong way. https://www.youtube.com/watch?v=AoTE3OsnOVA&t=40s
Are there more connectors like this? And how are they called?