Tiny ESC upgrade mod?

I found this tiny esc 2S 4A rating on online shop for less than $2. It's appears it use a SOT-23 mosfet from Si231x variant for N and P channel. From the Datasheet it rated 5A, but for savety reason it would be save to use it below 4Amps.

I need to upgrade this ESC to be able to handle current consumption around 7Amps. So the question is, can i change the mosfet with higher current rating? Or can i just stack the same type of mosfet on top of another, like parallel connection to double the current rating?

Maybe someone who do ESC modding or fixing ESC can help my case.

Thanks