If there are only 5 at netflix, there are still some
There are still 5
just google it
(Just watched the 5th.)
According to my research, I only find this date for the 6 episode, so it should have been running, so I put everyone in there.
6th epi: German first broadcast: Mon 04.05.2020 TNT Comedy
7th epi: German first broadcast: Mon 11.05.2020 TNT Comedy
8th epi: German first broadcast: Mon 18.05.2020 TNT Comedy
9th epi: German first broadcast: Mon 25.05.2020 TNT Comedy
10th epi: German first broadcast: Mon 01.06.2020 TNT Comedy
Check it out again there are repetitions, but not exactly on Netflix.
https://www.fernsehserien.de/rick-and-morty/episodenguide/staffel-4/23697
There are a total of 10 episodes in season 4
Sky has 10 episodes (season 4).