With earlier PPP firmware on the LG290P I was seeing 95% horizontal accuracy values in the 30 to 40 cm range. for 24 hour datasets. I’ve only done the one test with the latest firmware and that’s shown above with a value in the low 20 cm range.
I’m not spending a lot of time on it since it’s still beta, but there seems to be progress on Quectel’s end. If Galileo adds phase biases soon that will help too.