Thanks for the headsup guys much appreciated. I dont have any hacked Switch at my disposal. So knowing this info is helpful.
The only reason I have the Mig dumper is to dump my own games as backup. (Do have a Mig Flash as well but meh ... not risking it on my Switch2 or 1 for the forseeable future)
I actually tried reaching out through the Migflash contact option but it noted issues and to try again later.
But so this is the first NS1 cartridge I came across I actually could not dump with their dumper (and I did rouglhy 450ish of them. As noted the dumper sees me insert the game, but the rom folder simply wont appearr.
So it seems Nintendo might be on to something to prevent the dumping using the Mig dumper from now on.
Either way I will try to reach out later to the Mig team, but if you guys find out something please ... feel free to let me know