The phrase "about the only kind" is correct and usable in written English.
It can be used to emphasize that something is one of the very few types or categories available.
Example: "This is about the only kind of dessert that my brother will eat."
Alternatives: "practically the only type" or "almost the sole kind".
I guess that is about the only kind of cop show we see on television these days, isn't it?
Webb was born in 1848, and learned to swim in the days when wild swimming was just about the only kind there was.
Yeah, that's graffiti scratched onto the windows of the trains, which is about the only kind of graffiti you see anymore.
It seems that just about the only kind of creature that can't be a trickster, at least of the classic type, is a female, a fact that somebody should write a dissertation on.
Two years ago, when insurance sales were just beginning on the Internet, about the only kind you could buy was term life, the least complicated form of life insurance.
The rule addresses illegal uniform adornments and is specific about the only kind of wristband allowed: those "worn on the wrist beginning at the base of the thumb and extending no more than 3 inches toward the elbow".
But just about the only kinds of repairs that the building needed were the replacement of hundreds of windows that had been blown out on its western facade and the removal of heavy dust and debris.
One day last week I woke up feeling particularly buoyant and not at all insecure or defensive about the fact that the only kind of footwear that excites me these days is slippers.
Facebook's failures provide a direct rebuttal of ex-Googler James Damore's anti-diversity screed and former Apple diversity head Denise Young Smith's argument about cognitive diversity being the only kind that matters.
Much discussion of instrumental rationality has taken place in the context of a debate about whether instrumental rationality is the only kind of practical rationality or, alternatively, there are other requirements of practical rationality as well, such as requirements of prudence and morality.
We also had some prints in the house by artists like Rembrandt, Dürer and Sorolla, and I think I was lucky just to know what great art looked like, though when I got into comic books at about age 10, that was the only kind of art I was interested in.
