Prices are there in the TestFlight version. Assume the same error preventing purchases is preventing those being displayed as they probably pull the price dynamically from the App Store.
Since I can’t see the prices either, would you please tell us what they are?
Monthly $2.99, Annual $22.99 and Lifetime 49.99. This is in $AUD.
Unsure what that comes to exactly in USD but I assume it’s around $1.99 and $14.99 or there abouts. Other posts note lifetime is $30USD.