Something that shows the extent to which they are in sync and aligned, maybe even how their narratives co-develop in terms of timing
Might not be exactly what you have in mind, but I have a separate browser that has set as Home the following state-owned or aligned news sources from around the world to check different perspectives on current headlines:
https://www.bbc.com/ - Britain
https://www.abc.net.au/news - Australia
https://english.news.cn/ - China
https://www.foxnews.com/ - US Right-wing
https://edition.cnn.com/ - US Left-wing
https://www.rt.com/ - Russia
https://english.alarabiya.net/ - Saudi Arabia
https://www.dw.com/en/top-stories/s-9097 - Germany
https://www.batimes.com.ar/ - Argentina
https://www.sabcnews.com/sabcnews/ - South Africa
https://ddnews.gov.in/en/ - India
https://www.cbc.ca/news - Canada
https://agenciabrasil.ebc.com.br/en - Brazil
https://www.straitstimes.com/global - Singapore
https://news.un.org/en/ - United Nations
https://www.sbs.com.au/news - Australia, but more multicultural perspective
Is there any illusion at this point that the right and Russia aren’t fully aligned?
Right, but that does comparative journalism itself by collating all of it together also with Russian State Media