we don't know if Steven Wilson and others are already preparing class action suits against udio etc.
this stuff takes time. if you feel strongly, I'd suggest emailing a link to Wilson's management company with a link to the example above. artists may well already be searching for examples like these and the pre-trial action in one of the suits against microsoft/openAi copilot has shown that one of the big overheads in cases like these is getting the AI to spit out obviously infringing examples that can be used in evidence. udio would have to establish that it didn't have Wilson's music in the training set in order to fend it off.
if you help the artists along a bit, that may be worthwhile.