Josh Tongue is not exceptional.
He also spent the first half of the day bowling between 87 and 90 mph; he erred slightly full, but lack of pace is not an issue for him.
The bigger issue is that he's made of glass and that's because in the first 27 years of his life, not a single coach has done anything to reduce the amount of contradictory and torsion forces in his action that literally tear his body apart every time he bowls. I've tried to annotate a photo with what I mean:

This is one of the ECB's favourite fast bowling talents and seemingly nobody has stepped in to try to sort his alignment out. That's not to say that all bowlers need to bowl the same way as each other with identikit techniques: the obvious example of someone who doesn't is Jasprit Bumrah:
Aaaand Bumrah has far better biomechanical alignment than Tongue does, and that's why despite his hyperextension (which is the main culprit for all that visual weirdness in his bowling), he didn't really experience any significant soft tissue injuries: the majority of his injuries have been the result of repeated stress from his exceptional workload.
We can also compare him to two of the best-coached and best-nurtured fast bowlers in recent memory:
You can visually see how aligned and stable both Cummins and Hazlewood are through their delivery stride, despite having very different bowling actions.
Now compare that to Josh Tongue again, with footage taken from when he was bowling at his best a couple of years ago: