3D printed solder stencil on PCB, after applying solder paste ... and he wasn’t able to have it create holes for 0.2 mm x 0.5 mm pads without first modifying his printer for better X/Y accuracy.

Small “bridges” need to be manually added to hold the stencil ... behind your PCB design. You’ll still need to chemically etch the board, and if you’re using through-hole components ...