5V output switching with WEMOS D1 mini + MOSFET
Although parts of some of your descriptions have been a little unclear, your recent statement was:


  I have output voltage even when the Gate terminal is shorted to ground directly.


This only leaves faulty / damaged (e.g. by ESD) / counterfeit MOSFETs (or perhaps a problem with your PCB or other physical construction) as possible causes.

You could edit the question to add photos of your physical hardware, in case that shows something of interest. But the first thing I would do, is to get a suitable working, and known genuine MOSFET, and repeat your test.

Based on your information, I believe your MOSFETs are either not the type you believe, or are faulty / damaged in some way.