I wish I had a rosy picture to paint you but alas we have reality to deal with. A year ago in Sept 2021 the new SEC rule went into place, resulting in the destruction of dark stock trading. Every single online brokerage I know of in the US stopped allowing buys in any dark stocks.
This post is a summary of the few brokerages that still allow you to buy non-filing dark stocks.
If anyone has found a solution please comment or send me an email.