This quote might be stale, e.g. New Zealand suggests that it has identified cases of infection via lift button and bin: https://www.rnz.co.nz/news/national/427446/rubbish-bin-the-l...

Obviously this is disputed, because it's impossible to tell - saying "not been documented" is quite a neutral statement.

Even if surface transmission is unlikely, a single case could be enough to trigger a wider outbreak. So, if you are doing what you can to prevent aerosol transmission, then it also makes sense to minimise surface transmission.