VEVOR NEMA Splitter for Dryer and EV, 3-Color LED Indicator, 240V Smart Power Distribution, With NEMA 14-50 Plug, Two NEMA 14-50 Outlets, 3.4 in LCD Screen, Max 40A Dryer EV, Tested to ETL Standard

Yes, but the left socket is the main socket. The right socket will only work when the current of the left socket is below 20A, and the total current of the two sockets is 40A, which cannot exceed.

If this plug and socket match, it can be used. The plug is NEMA14-50

It does not have trickle charging function, this function is generally controlled by the EV end, that is, the charging gun or charging pile