I also have some Martin Jerry smart plugs that I loaded Tasmota on. One problem with these is they display as OFF in the Tasmota software when they are on. I removed entries from GPI04 and GPI05 to get rid of two extra buttons that were displayed in the GUI. The button on the side of the plug works but doesn’t light up right now.
For the plugs that I had, the relay needed to be changed otherwise off was on and on was off. So D6 change 29 to 21 and it works as expected.
I’ve got a generic Tuya Smart outdoor plug that I flashed with Tasmota. It has two outlets on it so the settings are below.
I named the outlets one and two and loaded them into Hubitat with the Sonoff-Tasmota driver as two separate virtual devices as switch number 1 and switch number 2. This plug is branded Amzdest with two outlets.
I tried another outdoor plug that I have this one is three outlets and labeled as Tonbux. I couldn’t get the third outlet working but found a link with a number of similar devices and used the setup from there.