I am a SME on this topic FYI.
Wrist pain has a lot of causes. Many do not show properly on xray (or even MRI). Central TFCC tears are extremely common on most humans over 40 and many times pathology is attributed to them when they are simply normal wear and tear and not the actual source of symptoms. A non union of the ulnar styloid is also completely benign and common. In this case the MRI may be over calling pathology that just isn't clinically relevant.
First I would see a wrist specialist of some sort (aka Hand Surgeon). I don't know what sort of doc is currently ordering your tests. You need a good examination from someone who knows wrists.
If your wrist is stable and only slightly tender I would ignore it. If it is stable and the pain is interrupting your life a series of steroid injections can often settle things down to the point you can live with it. If that doesn't work or the wrist is currently unstable, you need a surgery to get it stabilized and under control.
Hope that helps. Here is a link to find a good Hand Surgeon. There are plenty of good surgeons who are not in the ASSH, but members are usually high quality.
https://www.assh.org/handcare/fahs