Auria LE tempo change ?

[MixerFixer]

I have many backing tracks on LE, all produced from Logic, transfered as wav files to IPad via Imazing
I cannot seem to alter the tempo on the IPad. I see the tempo box. …they’re all default to 120, even tho tracks are lots of different tempos.
I can highlight the tempo box, then tap in a new tempo, and the numbers change, but not the tempo.
Doing something wrong? Or, tempos cannot be changed in this IPad/wav format ?
Any answers appreciated.
Bud