You would of had to reside in the country for 4 full years, and anytime during those years if you went out of Australia, even for one day, that would be deducted from your 4 year requirement. The 9 months you spent in Europe does not count.
But also, when you apply online through Immi you have to put all the dates you entered and left the country, so you wouldn't even be able to put the application through if Immi doesn't think you meet the 4 year requirement. I hope that info helps
After you came back to Australia on the visitor visa in November 2019 is when your residency would start. Since Nov 2019, did you leave the country at all and if so, how long?