In essence, yes. However the mobile port had features, specifically the lighting, that more resembled the original. Those lighting features were absent in the PC/Console versions until this update.

It’s literally in the article what was updated

In contrast, the mobile versions of Grand Theft Auto: The Trilogy - The Definitive Edition, released in December last year, met with critical acclaim. Players praised the ports for fixing several issues found on the console and PC versions, including lighting, shadows, reflections, and draw distance. A Rockstar Games blog post published at the time mentioned that these ports include a new classic lighting mode “that restores the look and feel of the sky in the original games.”

Now, finally, this classic lighting option is in Grand Theft Auto: The Trilogy - The Definitive Edition on PC and console. Early reports indicate sweeping visual improvements across the board that are already going down well with fans.

I got tired of waiting and played WWHD on a Steam Deck, ran flawlessly from start to end!

I’m in the US, also says page not found for me.

In Polish it means kneecaps

So then it works?