None of that is magical because it’s part of the natural physics of the D&D cosmos. Creating physical objects from nothing or summoning them from other planes of existence, extradimensional spaces, or great physical distances, are not (which is why those things are explicitly prevented by the antimagic field spell.)
I have no problem with extradimensional summoning being prohibited in an AMF. Thats what the spell does.
But the extradimensional summoning of a Pact Weapon is not magical.
It would say it if it were.
Supernatural for sure. But not magical.
Again, that’s a silly interpretation. A Dragon sorcerer growing wings is a natural (albeit impossible in real life) phenomenon. Teleporting something (or someone) to Baator is not, hence AMF stopping it.
No, Hurl through Hell (Fiend lock 14) is not blocked by an AMF on account of being magical
because its not magical.
It's blocked by an AMF because its extradimensional travel, and the AMF blocks that as well as magic.
Its perfectly possible to travel to other planes not using magic. Ghosts for example do it all the time:
The Ghost in travelling from the Material plane to the Ethereal plane (and back) does not register as magical to a Detect Magic spell. An effect that blocks magic would not block the Ghost from travelling to a different plane of existence using this ability because the ability is (expressly, by omission of the words 'magic, magically or magical')
not magical.
Such travel would however be blocked by an AMF because that ALSO blocks even
non magical dimensional travel or extradimensional spaces (like a Pact weapon being summoned, or a Ghost entering the ethereal plane from the material or vice versa).
If you honestly believe that the writers both have such a rule in their style guides, and never forget to apply it, then you and I are never going to be able to agree about this matter.
It is clearly in their style guides because its how rules language is expressed in 5E, as they clearly explain in Sage Advice.
I cant speak to whether they simply forgot to include it (and its thus a typo) in the Ghosts planar travel, or the Warlocks pact weapon class feature.
See also language like 'target you can see' which (among other things) has an interplay with invisibility, or the distinction between an 'attack with a melee weapon' and a 'melee weapon attack' (which are different things and have different rules implications, or even just what is an 'attack' and what isnt when that word is used.
The rule is
unless the ability, item or effect expressly uses the words 'magical, magically, or magic' or uses spell slots to function, or mirrors a spell or spellcasting,
it is not magical.
Supernatural, bizarre and extraordinary, but not magical for game rule purposes.