Seatbag strap size and Wolftooth Valais/dropper?

Got a Revelate terrapin I want to use on mountain bike but want to protect the dropper.

Seen the Wolftooth Valais which will help me use it on the dropper post. But concerned about the size of the strap on the terrapin.

Wolftooth say the Valais is designed for 2.5cm straps but will work with bigger, however the terrapin strap is 5cm. Reluctant to cut it down as also use it on gravel bike.

Anyone used the Valais with this size strap, or suggestions for a similar thing that’s compatible with bigger straps, or other workarounds?

Thanks!