It would be great if there were some more phonics/learn to read cards available. One potential idea could be to collaborate with existing early readers/phonics learn to read book series. For example, the Learn with Peppa Pig Learn Phonics series, given other learn with Peppa Pig Yoto cards currently exist, and given audio is also already available from the Learn with Peppa Pig website. Other ideas could include Alphablocks, Mrs Wordsmith (audio exists through their website, qr code system), Usborne early readers etc. The Yoto phonics are great, but so is variety.
You've queried where I live, in Australia. Content doesn't need to be Australian English specific, more than happy with British/UK accents, letter sounds, spelling etc.