I use JLCPCB for a lot of my PCB assembly and ordering.
Their editor, EasyEDA, has libraries with footprints that can be exported as JSON.
These parts are sourced from for example Search by "FH26W-41S-0.3SHW(60)"
I’m wondering if anyone has a tool to import these LCSC parts directly into a My Library, or to generate a library of some sort that is interoperable with LCSC
Theoretically you could convert EasyEDA libraries to KiCad with easyeda2kicad.py and then import those KiCad libraries into LibrePCB But of course this is not convenient at all.