Hi there,
Yes, the Koodo travel passes expire from your account after a while for billing purposes, this is the “use by” date you see. They’re intended to be a temporary add-on and not a permanent one. Once they have been used or expired, they can be added again.
If the pass goes unused on your account and it eventually expires it will be removed from your account (like in your case of the sept 9th) and you will not be charged for the pass on your next billing cycle. This is different if you begin using the pass and it expires mid use - you will still be charged for the pass and it will still be removed from the account on the specified date.
I recommend removing the pass from your account for now and re-adding it closer to your travel dates. Make sure to align the adding of the pass with how long you will be gone for so that it does not expire during your trip.
To remove the pass, you can do so in self serve under your add-ons. Steps to do this can be found here: https://www.koodomobile.com/en/help/changing-your-add-ons?