Nah, they'll see that as a really positive result. Labour won handsomely but I think anyone can see that this was a one off opportunity to can Starmer vote with tactical voting to that end.
Looking at the numbers, the Tories, Greens and Libs got less than 1500 votes between them. The Tories and Libs are done, the Greens will only attract a select crowd, and will likely only do well in certain areas.
This showd that Reforms only threat is Restore. They'll walk the next GE barring a miracle, but in fairness to their voters, who else?