So, in the 1.12.2 version of mekanism i use to change digital miner's range on the mod config, but now in 1.16.4 we cant access mod config anymore , is that any way to do it anyway?

The config still exists it is in config/Mekanism/general.toml if memory serves

The config still exists it is in config/Mekanism/general.toml if memory serves

Where is that config/Mekanism/general.toml? i cant click the button that says config in minecraft, its just not clicable, so im on the mod folder, can you explain me how to change the digital miner radius?

There is no in game config currently, as forge doesn't have a prebuilt GUI. And I gave you the file path from your minecraft install. There is a config folder in it, inside it there is a Mekanism folder, and inside it I believe the general file is the one that has the range.