Question fullsets roms versions dumps and official games

[Ragnar]

To make the dump you need a device to copy the eeprom file from the cartridge to some floppy disk, card or other media

That's the general gist of it.

In the case of no-intro and tosec fullsets, the ROM dumps were extracted recently and not 20 or more years ago like in the Good fullsets?

No. Same files. They're dumped to the same standards. Perhaps some rom sorting software will set specific file extensions, or demand certain headers (or headers removed), but they're all the same files. There are carts that were dumped properly once and only once, because dumping it properly required destroying the cart. And that single dump is in every romset.
No-Intro, good and tosec all might dump their own games to discover what is "correct". But not one of them distributes or release dumps, they publish and say ______ filehash is correct, and then everyone looks and says "ohh I already have ______ filehash file so I'll copy paste it".