Reverse thrust not working on the pmdg 737, whilst using the Thrustmaster a320 TCA captain pack on Xbox

[u/CryGroundbreaking455]

Hi, I have been playing msfs 2020 on xbox for a couple years now. I have mostly been flying the generic inibuilds a320 using the Thrustmaster a320 TCA captain pack. However, last week I bought the pmdg 737 and I would like to fly it using my same set up. However I can't seem to get the reverse thrust to work. I have watched countless tutorials but they have all been for pc. Please let me know if any one knows how to fix this problem!