I still like the dab-on Dylon. I have an old bottle, its only 50ml or so, but its great for stubborn stains. Otherwise its warm water, soap and elbow grease.
[edit] cannot see it for sale anywhere. Not even on ebay. Plenty of dylon spray and other stuff but not the dab-on. damn.
Yes, but many marketed under different names. Effectively any powder soaker which has sodium percarbonate as the active ingredient.
While sodium percarbonate is usually in small print and sometimes hard to discern look for âOxyâ on the label. They are usually sold in plastic âcansâ of a crystal-like powder. If you look at the Choice link @phb provided above you will see the âOxyâ on many labels.
The differences in the products (beyond the labels and prices) is most often the concentration of sodium percarbonate and thus how much need be used for a simlar result, and sometimes how long the product is âguaranteedâ to maintain its concentration of the sodium percarbonate.
Grateful for the translation, Phil ! 
phb obviously considers the rest of us to be knowledgeable merely because weâre here ! [grin]
Apologies, I didnât want to name any brandsâŠas being seen as endorsing a particular product.
In a supermarket, they are in the clothes washing detergent aisle, usually in their own separate section. Coles and Woollies have them in the same section as the fabric stain removers and next to bleach. Some containters are white, others pink.
Oh my dear, I was pullin yore liâl laig ! 
I think itâs unfortunate that you couldnât get a plumber to hook up your own W.M.
to a sink in the bathroom or in the kitchen and have to use a communal laundry during a pandemic. The following article from Choice might help.
No room, Gaby - small bathroom. And I canât see myself - age pensioner - being able to afford that (in rented premises âŠ).
