It appears to be official stylized capitalization: https://www.netflix.com/title/81226955

Netflix always uses the capitalization of the poster art for all movies (e.g. okja, THE OTHER SIDE OF THE WIND), that is not the official title and it is not used this way anywhere else.

Where is anywhere else? Is the title stylized in the opening credits?

The entire opening credits are capitalized this way, so that's not necessarily related to the title. "Anywhere else" means imdb, wikipedia, rottentomatoes.

So official sources (original distributor, poster, opening credits, trailers) all use the same all-cap title. But you think TMDb shouldn't use it because other databases/unofficial sources do not use the official capitalization (IMDb never use stylized titles)?

1. The film premiered in France in 2017 and was screened at a festival in 2018, so whichever title Netflix uses doesn't have to be the original title.
2. Posters and credits frequently use all caps, yet that title is almost never used on this site, not even in the example used in the guidelines. I don't think this type of capitalization is stylized, it is pretty much the default, so that's not comparable to a deliberate choice like the lower-case 'm' in "mother!", for example. If that were the case, a lot of titles would need to be changed.
3. This is completely unrelated, but why is the buget listed as $10,000,000.00? That sounds pretty unrealistic, is there an official source for this figure?

whichever title Netflix uses doesn't have to be the original title.

It kinda does. It's the original distributor. TMDb always uses the first release, excluding festival and premiere screening.

not even in the example used in the guidelines.

The example refers to the original Japanese title.

Posters and credits frequently use all caps

True. An all cap/stylized logo do not mean much on its own. But the sole distributor deliberately using it on their platform has a lot of weight.

why is the buget listed as $10,000,000.00?

I removed it. If anyone has a reliable source for the real budget, please let me know.