Are Ultra Beast shiny locked?

Shiny Ultra Beasts For Sale - OPEN by Kid-Akashi on DeviantArt

Ultra SHINY 6IV PHEROMOSA / Pokemon Sword and Shield / Alolan - Finland

My First Ever Shiny and it's an Ultra Beast : r/PokemonSwordAndShield

Bundle Ultra Beast – Shiny and No – 6IV – Pokemon Sword Shield - Pokemon Valley

Ultra Beasts Shiny Nihilego - mini P T C 100k stardust

LF: Shiny Ultra Beasts, Shiny Gmax Centiskorch, Shiny Uxie, Shiny Dracovish, Shiny Tapu (not koko), shiny virizion and shiny terrakion. : r/PokemonHome

All the legendary, mythical, and ultra beast pokemon with shiny forms

Pokémon GO Ultra Beast Appearance Times - How To Catch Nihilego, Buzzwole, Pheromosa, And Xurkitree

Pokemon 10799 Shiny Mega Kartana Kirigami Pokedex: Evolution, Moves, Location, Stats

Pokemon Sword and Shield Ultra Beast Bundle 6IV-EV Trained – Pokemon4Ever