The phrase "as does the existence" is correct and usable in written English.
It can be used to indicate that something occurs in the same manner as the existence of something else.
Example: "The concept of time is elusive, as does the existence of parallel universes."
Alternatives: "as the existence does" or "just like existence".
Japan, Korea, France, Germany, and Great Britain have consistently fielded the strongest teams in the Olympics, as did the Soviet Union during its existence.
Does the existence of the universe?
The extent to which CLDN expression is tissue dependent remains a subject of research interest, as does the physiological relevance of the existence of multiple CLDN species.
Paris's new concert hall, the Philharmonie de Paris, owes its existence to him, as does the rest of the Cité de la Musique, his own group the Ensemble Intercontemporain and IRCAM, the musical research institution attached to the Pompidou Centre.
And the sight is a marvel — assuming, under the category of the marvelous, that you count, as I do, the existence of the largest concentration of graceless concrete high-rise housing units ever to stomp across the landscape of a Central Europe country formerly under Communist control.
And why deny with such force — as the administration did — the existence of previous understandings between the United States and Israel over limited settlement construction?
A recent lively Twitter discussion revealed, as these things often do, the existence of a group of utter barbarians: people who do not wet their toothbrush before brushing their teeth.
It seems safe to infer that filial guilt had its role in the creation of "Truth," as did the wish to honor an existence that the world at large would consider unremarkable.
Satellite images were useful throughout the cyclone's existence, as did the wind reports of three ships when Ava was a young tropical storm.
She'll get everything she wants, and as she does the need for her existence will steadily shrivel into nothing.
