Well NEO chould be considered nigh-omnipotent but the problem is that he has shown that he can be hurt or damaged by ather beings something that is cosidred a limitation usually nigh omnipotents have no real limitations and are weak to only a few specific things take discord for example while he is shown to be weak against anti magic spells like tireks magic absorbsion he has never show to be weak to anything alse ather than those anti magic spells whitch is a very very specific weakness and thats the mane reason why he is listed as one of the exaples of night omnipotence while NEO isnt.
Finally while NEO has never shown his limitations we know for a fact that he isnt eiven close to being the first or eiven the seccond strongest character in his verse while night omnipotents are usually the closest thing to the top you can find in a verse.
1.You do realize that the damage they caused were minor right they never did any major damage
2.You do realize that many beings you listed as Nigh-Omnipotent aren't the second or first strongest in their verse either so NEO shouldn't be any different
3.NEO has enough evidence to suggest he's above most of not all characters in Digimon
NEO should be Nigh-Omni
Nigh-omnipotent means that you have the ability to do almost anything with only a few limitations NEO has never shown the ability to do absulutly anithing and has being damaged by leser beings NEO also has never shown any feats that whould put him above ather powerful beings in the digimon universe thats not eiven close to being nigh-omni