Which shiny variants can a Pokémon transferred from Pokémon Home have?

In Pokémon Sword/Shield, there are two variants of shiny forms which have different types of sparkles:
- Square Sparkles
- Star Sparkles
Yesterday, I received a shiny Pokémon in Pokémon Home through the GTS. The Pokémon had never been transferred into either Sword or Shield (it had the question mark icon and displayed the warning message stating it cannot be moved back into it's original game). I continued to move the Pokémon into my Sword game. After sending it into battle, I noticed the Pokémon had square sparkles.
That got me wondering: Given the separate variants is a new thing in these games, can a shiny Pokémon that's never been transferred into Pokémon Sword/Shield from Pokémon Home have a chance of being either star or square sparkles, or will it always be square sparkles? If it can be either, are the odds the same as if you were encounter one in the wild or are the odds more even?
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Can you transfer shiny Pokemon from Pokémon Home?
Pump the brakes on transferring that Shiny Groudon to Pokemon Sword and Shield. As of today, Pokemon Go is now compatible with Pokemon Home. This is exciting news for Pokemon fans, because it greatly expands the number of monsters that can be transferred from Niantic's popular mobile game to Pokemon Sword and Shield.Can you transfer shiny Pokemon from Pokémon Home to Pokémon sword?
Players are able to transfer four normal Shiny Pok\xe9mon before their energy is entirely depleted, which means free-to-play users can transfer between 1-4 shinies per week.How many shiny Pokemon can you transfer from Pokémon Go to home?
You're unable to transfer multiple Shiny Pok\xe9mon, Lucky Pok\xe9mon, or Buddy Pok\xe9mon with whom you've reached Good Buddy status or above at a time. Additionally, certain Legendary and some Mythical Pok\xe9mon (e.g. Mew, Celebi) are not able to be selected for transfer.Easiest Shiny Pokemon in Every Game
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Images: Anete Lusina, Anete Lusina, Anete Lusina, Anete Lusina