Sorry to hear about your tire problems. What I can make out from the picture it appears you had a Tread or Belt separation not a Run Low Flex "blowout" failure.
While I strongly recommend all RVs run with TPMS they will not warn of an impending Tread/Belt separation but will warn of the Run Low failure.
Often the separation is in a tire for many hundreds of miles before the tire coes apart. With proper inspection procedure it is many times possible to "see" the indication of an impending separation before it happens.
If you Google "How do I inspect my RV tires" you will find some links with information. At least one has a link showing a YouTube on the process.
There is also a post on an RV tire blog on a "Blowout Real Life Experience on RV tire" that occurred on an Airstream
You might also read the thread on this forum on "Why Tires Fail"