Hi, JCarizona.
The Apple Watch Series 9 ban will only affect newer sales of the Apple Watch in the U.S., this ban was inflicted by Apple due to patent issues and an ongoing lawsuit, so they have decided to take matters into their own hands. Purchases of newer Apple Watch models will still be possible in the U.S. in third party stores such as Best Buy, etc.
This ban will NOT affect the performance of the watch itself and you will still be able to get the same support and updates as any other watch. As the lawsuit attacks a certain functionality (which is Blood Oxygen), that feature may be affected in a future update pending on the result of the suit.
Feel free to ask if you have any further questions.