Best method for Shiny Hunting in Legends Arceus without mass outbreaks?

Question

Does anyone have any advice for shiny hunting in Legends Arceus without using mass outbreaks?
I already beat the main story, but do not have the shiny charm (Im working on it)
Are there specific routes you can take in a section to cover the most ground and most Pokémon?
And what are different methods of shiny hunting in Legends Arceus?

Comments

There's some good paths in the beach and swamp biomes to see a lot of Pokemon