Cannot find "boot/config.txt"

where is the boot/config.txt file in wp76xx??

there is no such file in wp76xx.

then how can I setting default for dtparam and dtoverlays??
Could you to help me

i don’t know what are dtparam and dtoverlays

It’s device tree parameter and overlays.
is it can set the default in wp76xx?

I want to set both of this

you can have a look here on setting the device node: