Is the propane working for any appliances (water heater, furnace)?
For our stove (I donít know if yours is the same as our 2019), you need to push the gas knob in while pressing the igniter button. Once the burner lights, the gas knob must be held down for about 5 seconds or the flame goes out. This is for safety; if the thermocouple doesnít sense a flame, it shuts off the gas. Maybe you just need to hold the knob down longer?
2019 Tiffin Wayfarer 24TW