I just checked it on Landgate and it also says Mervyn street so I guess they must have changed it in the last three years.

Also for future reference I don't believe we are able to use Landgate as source due to copyright.

osm.org/changeset/72853792 rather

What is your source for naming Homemaker Street?

It is named Mervyn street on street signs and in MRWA

https://portal-mainroads.opendata.arcgis.com/datasets/road-network

Granted there are a few streets with novelty names around Bunnings but I can't find any source for this one. Perhaps one of the currently unnamed service roads in the vicinity is Homemaker st?

In the mean time I have renamed it to Mervyn st in osm.org/changeset/72853651

Is this permanently blocked? from where are you able to access the road?

Is this a music venue?