I think ui/ux has the opposite problem where there are not enough programmers. Idk if there is a shortage of ux people, but I do know that it takes a significant amount of work to implement and maintain ui projects.
If you are interested in helping out though, you should join the discussion forums for a project like KDE or Gnome. I doubt the Gnome people will give you the time of day, but there are many KDE projects that would appreciate volunteer work from someone like you. Browse the discussions at htltps://discuss.kde.org and see if you can find a project to latch on to, or find a project you think you can improve, and proactively reach out to the maintainer(s) with a proposal.
Just be mindful that it may take a while before your changes are implemented, since everyone is a volunteer with other jobs and responsibilities.
We already have the technology for AI waifus. I bet we’ll be able to print AI body pillows before the end of next year.