I don’t know the type of tree, but that kind of “flat” growing can be accomplished with any tree! It’s a method called espalier and is commonly used on fruit trees. You can even grow a living fence with this method. Growing the trees apart and then splicing the branches together.

I would think pyracantha, based even on the post title alone. The picture only makes me more certain.

Then again, I am not familiar with some of the other plants suggested in the bot post.

Automatic identification via PlantNet summary

Most likely match: Mitraria coccinea Cav.

Beep, boop

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