Never heard of Triller. TikTok can't be competed with because it's already too big. Try competing with Facebook by creating an app that does basically the same thing, you will almost certainly fail to become bigger than Facebook (obviously).
Byte tried it, and hasn't seen good growth at all. TikTok has too much money to spend on advertising, and too many users that they've already won. Competing with a similar app is just dumb at this point, move on to something else.
How subjective is "27 million users"? TikTok and it's ilk are such viral-driven products I imagine metrics like DAU are gamed to Narnia and back. They NEED those metrics to sing to get funding and advertisers.
Byte tried it, and hasn't seen good growth at all. TikTok has too much money to spend on advertising, and too many users that they've already won. Competing with a similar app is just dumb at this point, move on to something else.