Since you do not have a duty to disclose prior art to the USPTO, you could approach your competitor and try to negotiate a license for their patent pending technology. However, there are two caveats to this approach.

First, your competitor does have a duty to disclose prior art to the USPTO. If they learn about the prior art in the course of negotiations with them for a license, they would need to disclose that prior art to the USPTO if the patent has not yet issued. The patent could be declared invalid if they later sued an infringer and it came out during litigation that they did not disclose known prior art.

Second, it is much easier to notify the USPTO of this prior art while the patent is pending than after the patent issues. You would only have to pay $180 and would have six months after the application was published to file the prior art with the USPTO (under the new rules of 37 CFR 1.290). The USPTO will only consider written documents, so there would need to be some kind of published document relating to the prior art you found, such as a company brochure showing or describing the feature.

I would be happy to assist you with this matter whether you decide to negotiate with your competitor or submit the prior art to the USPTO.

It is a very rare occurrence that an infringement goes from infringement straight into litigation. There is always a dance that goes with it, usually starting from the side of the infringed party. From there discussions take place, and usually resolution is achieved. If you have a hammer knowing that you can invalidate their patent by showing prior art, then I'd probably just operate under the radar and hope it goes unnoticed by them. In truth, there's probably a good chance that their patent won't actually get registered due to the prior art so it may be a non-issue in the first place.

The easiest way is to fail or never amount to much. Patent litigation, like taxes, comes with success. I typically hope for patent litigation because it means I have reached the point where it is worth litigating.

It may not be possible to eliminate the risk of an infringement claim against your invention. However, with thorough research and informed design, you can minimize the likelihood that your patent infringes on an existing claim. To avoid patent infringement, ensure your innovation will later pass the test for literal infringement and the doctrine of equivalents requirements.
Patent infringement searches unearth specific patent claims that your proposed innovation may infringe upon. The result of this type of research is an assessment of the risk of infringing on an existing patent with your new technology. To avoid patent infringement, it is best to complete a patent infringement search early in the innovation cycle, so that your product can be designed around existing claims. While this process sounds like a patentability search, the two are different because they serve different purposes. An FTO search aims to assess the likelihood of infringement; a patentability search focuses on proving novelty.
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath