Sadly I can't find any composting certifications for this product. In Australia you're looking for AS5810 (Certified Home Compostable) or AS4726 (Certified Industrial Compostable).

I reached out to Sea to Summit and received this comprehensive response Our Wilderness Wipes are made from LENZING™ Viscose, which is fully compostable and biodegradable in soil conditions according to the European norm EN13432. This is the strictest of all existing norms evaluating compostibility and biodegradability. As LENZING ™ Viscose fulfils the requirements of compostibility according to this norm, it is certified with the TÜV Austria logos OK COMPOST, OK COMPOST HOME, and OK BIODEGRADABLE SOIL. It's worth noting that OK COMPOST HOME isn’t based on one standard, but rather details a number of technical requirements a product must meet in order to obtain the certification. It was actually used as the basis for drafting AS5810 back in 2010. OK BIODEGRADABLE SOIL is a guarantee a product will completely biodegrade in the soil without adversely affecting the environment. Biodegradability in the soil offers huge benefits for agricultural and horticultural products, as they can be left to break down in situ after being used. With all that in mind—yes, you are absolutely fine to use these in a long drop or composting toilet. However, I know that places like the Bibbulmun Track Foundation ask that you only use the toilet paper suppled by them at their long drops (or, they have requested this in the past). Because of this, it would be worth checking in with them to get their thoughts on it. I’d be happy to contact them and ask if you’d like?