You've got the wrong idea to begin with. They created amourshipping not because it was the "region of love" but because shukichi kanda, a producer of the anime suggested it. Shipping isn't restricted to regions ; kukui and burnett being the biggest example also contest shipping and penguinshipping.
Her crush is an integral part of her character and also happens to be her goal. Being his wife is as important to serena as being a pokemon master is to ash. Everytime she returns you can bet they'll promote amourshipping in some form or another because she's a love interest first and foremost.
If you've watched enough anime you know what i'm talking about. This is the hinata/mikasa archetype.
You don't get it. Remember piplup? That's her signature mon or in other words her identity. She's that person with a comic relief piplup, that's who she is. Serena's identity is her crush. They didn't forget that dawn had a piplup, they won't forget that serena likes ash.
JN forgets nothing as proven time and again.
I dont want to get too deep with this because this thread could get locked because of this subject, so i''ll say this just once:
The Pokemon anime is different than most anime.
Some anime are adaptation of manga and some are the original source(like the Inuyasha sequel called Yashahime)and in the case of Pokemon, its based on the Pokemon games, which means the Pokemon anime is used to promote the games.
you're right that shippings have nothing to do with the region's aspects, but the Amourshipping was treated differently than most shippings, the writers went out and decided to make Serena Ash's childhood friend, thing that they never done before.
the fact Serena freaked out when Penelope told Ash that he has to come with her despite their age difference.
the fact Serena considered the time spent alone with Ash " a date".
we never saw such things with the previous girls Ash traveled with.
i think the Sun and Moon anime proves my point: Ash was finally allowed to win a league so you could ask: if the writers wanted Ash and Serena to get together, they could let Ash win the Kalos league and let Serena become the Kalos Queen and make them stay together in Kalos, but we all saw they didnt.
so why Ash won the Alola league of all leagues?
i have 2 points in mind:
1.Ash is based on the games protagonist or the games player character and before the Sun and Moon games, every time the player character wins the league, he or she will always challenge the region's champion over and over again until Sun and Moon.
in Sun and Moon, once you win the league, you no longer face the reion's champion since now you're the region's champion and instead you defend your title as champion, so the same happened with Ash, he became the Alola Champion for good just like the player character.
2.the writers always resorted to the same formula before the Sun and Moon anime: Ash collect 8 gym badges, challenge the league and lose at point during the league conference until the Sun and Moon anime.
since the Alola region doesnt have gyms like the previous regions, the Sun and Moon anime had to be treated differently.
the main setting was the Alola region, but the episode alway start in the Melemele Island, a thing that was passed on to Pokemon 2019/ Journeys.
this is just my guess, but i think the Sun and Moon anime was popular and successful in Japan so the writers decided to use the new formula in Pokemon 2019/ Journeys too and even though gyms were brought back the in the Galar region, the writers decided that since Ash already won the Alola league to give him a new goal: to become the strongest trainer using the world championship(too bad the world championship became a wasted potential as time passed).
and you say Pokemon 2019/ Journeys forgets nothing? so where are the Orange Island and the Decolora Islands?
i wont repeat myself after this, i just hope my points were clear.
if you want animes where the main protagonist get married then dont come close to Pokemon and Yu-Gi-Oh because you''ll most likely be disappointed.